The present Essay being considered an humble attempt to investigate a portion of intellectual physiology, an apology will scarcely be deemed necessary for a short digression to inquire into the powers and faculties of the human mind: and which, when determined, may be viewed as the alphabet of mental science.

Systems prematurely constructed, and under the impression of authority, have been especial impediments to our intellectual progress: and this truth has been remarkably exemplified in the works that have treated of the human mind. In the numerous treatises on this subject that have issued from the press, there is but little agreement concerning these powers or faculties, and it is evident that a definite number must be required: some writers enumerate more, others less, and it is not unusual for some of these metaphysical projectors to split a single and presumed faculty into a variety of subdivisions. To the acute and patient observer, it will appear that the operations of Nature are contrived with admirable simplicity; but man, in his endeavours to explain them, has generally resorted to a mysterious and discouraging complexity. Thus, as might be expected, the same faculty, according to different authorities, has dissimilar energies,—one is detected to encroach on the boundary of another, and when the mechanism of mind, fabricated by these scholastic dictators, is attempted to be set in motion, it is found incapable of working. For the grand moving power we have an undefined, and consequently unintelligible doctrine of Ideas, of supposed spiritual and directing agency; the admission of which would destroy the responsibility of a human being both here and hereafter, and degrade his ennobled condition to the instinct of the speechless brute. To endow these insubstantial and reflected phantasms with some activity and mimic play, a theory of the association of Ideas has been erected, without having previously established that they are capable of such confederation. A wearisome catalogue of faculties, many of which are conjectural, has been enumerated; Abstraction, Conception, Contemplation, Consciousness, Comparison, Imagination, Judgment, Memory, Recollection, Reminiscence, Retention, Perception, Sensation, Reflection, Thought, Understanding, Volition, and many others that caprice has created, or a subtle discrimination helped to multiply. These are the materials out of which scholastic metaphysicians have fashioned their unresembling model, and deserted Nature. It is not intended in this abbreviated essay to settle the pretensions of these numerous faculties, the discussion of which would require an ample volume: and the award might probably be protracted, till the claim was forgotten. When we contemplate the dexterities that the hand performs, and the monuments of skill and taste that it has elaborated; it would only create unnecessary distinctions to affirm that it possessed the faculties of sculpturing, painting, writing, spinning, weaving, sewing, and numberless other manipulations: besides those that ulterior discoveries may enable it to accomplish. However profuse these constructors of the mind may have been in the accumulation of its component faculties, they appear to have little regarded language, its most prominent and important feature; the universal menstruum of intelligence, and accredited currency for the circulation and exchange of thought. There are two faculties or capacities that are peculiar to the human intellect, by which our species has attained a supremacy that leaves all other animated beings in a distant rear: the possession of which has rendered man a progressive being, and the race of animals so nearly stationary, that however they may be tortured into improvement, they feel no emulation to proceed, and the acquirement perishes where the brute expires. These undisputed faculties are Speech, with its recording characters, and the comprehension of numbers, the powerful sources of that pre-eminence which man has already attained, and to which he must be indebted for his further advancement.

As Ideas are wholly incompetent to explain the process of thought, the next inquiry will be, whether words are capable of affording the adequate solution. For this purpose, the simple experiment would be sufficient; and as we are conscious, under due attention of all the acts that the mind performs, every person, in proportion to his habits of deliberately noting that which passes within himself, will be enabled to institute this examination. It is however to be lamented, that Thought is not the constant or habitual exercise of the mind on the phenomena of Nature, the occurrences of life, or the subjects we listen to and peruse: but is only occasionally awakened by difficulties, excited by contention, or invoked by the promise of fame and by the hope of emolument. The usual course of education is but little calculated to promote the habitudes of thinking, and especially that teaching where authority dictates, and demonstration is neglected. Much of this instruction is enforced by degradation and terror; and the pupil, at an early age, is compelled to swallow doctrines which he is unable to comprehend, and consequently cannot digest, except through the peptic assistance of the scourge: and which, when matured by manhood, and enlightened by reason, he is forced to reject.

Thought requires knowledge as its basis, and in proportion to its extent on any given subject, the investigation will be productive. This knowledge may be acquired by conversation, reading, or experiment, and these require Language, or a composition of words. Knowledge supplies the materials for thought, and every thought must be a distinct proposition, or sentence composed of words. A single word, although it possesses a distinct meaning, cannot constitute a thought, which implies a separate proposition or inference contained in a sentence: still less can it be supposed to result from an individual phantasm or Idea. When it is considered that language is composed of words adapted by position to represent all the phenomena and contingencies of human affairs, and that we employ them, by commutation, for all that we can experience as sentient and intellectual beings, we shall be able to understand that they are the mental currency previously described, and that they are the only instruments of intelligence to which we can resort for the communication of our thoughts, or for the process of their elaboration. They must be expressed in words, and by words prepared for such expression. Without attempting to investigate the different kinds of words, or parts of speech, the province of general or philosophical grammarians, whose unsettled disputes still perplex the patient and modest inquirer, it will be sufficient to remark that we possess words adapted to convey all the shades of opinion and degrees of feeling: and when these words, under the guidance of acquired knowledge, are perspicuously arranged into a proposition or sentence, they constitute Thought: and the act of thinking consists in their correct selection and arrangement for the purpose of promulgation by speech or writing, and which is very properly termed composition. When we reflect, that from our infancy to the natural decline of our intellectual powers, we are employed, during our waking hours, in the exercise of language;[8]—by conversation, often desultory, where we range through a variety of topics, as the bird sports from branch to twig; to the more deliberate act of composition, where the mind enduringly broods on the subject;—or when we read, and attentively consider the thoughts of others:—these occupations contribute to augment our vocabulary, and fix the meaning of the words we employ. By these words, and the intelligence that resides in them, although many centuries have passed by, we participate, and feel impregnated with the pure and exalted spirit that conceived the Iliad and Odyssey. Time has not diminished the vigour or impaired the beauty of those memorials that have survived the extinction of the Grecian states, and the glory of the eternal city; and such is the luminous correspondence of Language, that by transfusion into our vernacular idiom, we may receive a satisfactory measure of the original inspiration. Let it be kept in view, that Ideas, the frail associates of a perception, possess no permanence, are incapable of being transferred, and must fade away when our existence terminates. It is the word that forms the nucleus, and contains the intellectual deposit, that may become the inheritance of future generations.

This process, in no manner or degree tends to subvert the spiritual nature of Thought, which has its source in the capacities whereby we perceive, remember, and comprehend that significant sounds or words are the commuted representatives of the objects of intelligence. The perceptive organs of many animals are more exquisitely endowed than man, and their local memory more retentive; yet they are wholly incapable of comprehending language or calculating numbers;—capacities by which the Creator has exclusively dignified the human race.

It may excite some surprise that an Essay on Thought should be connected with the construction of a perspicuous sentence. To explain this conjunction, it may be urged, that there can be no evidence of thought, until it is promulgated by speech or written character: and, on all important occasions, such communications of meaning become absolutely necessary. Acquiescence or dissent may indeed be tacitly conveyed, by holding up the hand, or by ballot, without condescending to offer any verbal reasons for the adoption or rejection of the proposed measure. Affirmation or negation does not in any manner constitute Thought; such determination may result from caprice, from ignorance, or from prejudice, without the slightest consideration. Thought requires some proposition clearly conceived and perspicuously expressed in a sentence; and the clearness of the Thought will be ascertained by the perspicuity of its verbal expression. There may be some difficulty respecting the precise meaning of individual words, arising from the corruptions of the ignorant; but more especially from the perversions of writers who have been deemed authorities. This distortion of the original sense, is, in a certain degree, incidental to all living languages, which being in childhood acquired by the ear, the learner is compelled to adopt the signification of words, and employ the current phraseology of those with whom he associates. When he is subsequently taught to speak and write by rule, or grammatically, generally at an age anterior to the exercise of reason, he is coerced to imbibe that which is forced in the way of instruction. Even at a more advanced period the student cannot readily comprehend how a perspicuous sentence is formed by the position of individual words, each bearing a distinct signification, which it is presumed must be the fact: but Mr. Dugald Stewart, in his Philosophical Essays, p. 155, has introduced a doctrine entirely opposite to this well-founded position. "So different is all this from the fact, that our words when examined separately, are often as completely insignificant as the letters of which they are composed: deriving their meaning solely from the connexion, or relation in which they stand to others."

For the memory of Mr. Stewart, in common with his surviving pupils, I feel the reverence that is due to a learned, eloquent and amiable instructor, although I may now differ with him in many essential points relating to his philosophy of the human mind. The fact, that every word possesses a distinct meaning, appears to constitute one of the foundations of language: and it is impossible to conceive that any word, in itself completely insignificant, can impart signification to others; that which it does not contain cannot be communicated. The reservation contained in the word often, implies that some words really are significant; but no directions are given how to discover, and select from the copious vocabulary of our language, such as are impregnated with meaning, in order to expunge those that are insignificant. When we consult Dr. Johnson's Dictionary, we find that the greater part of the words enumerated in his ample collection, instead of being senseless, enjoy an exuberance of meaning. Thus the verb to think has ten significations; the substantive Thought (the preterite of the verb), 12; Something, n. s., 5; Nothing, n. s., 11; Smooth, adj., 6; Rough, adj., 12; To stand, v. n., 69; To run, v. n., 62; Empty, adj., 9; Full, adj., 15; Beginning, n. s., 5; End, n. s., 20; Before, prepos., 12; After, prep., 6. However strange, or perhaps ludicrous, these numbers may seem, yet, in the progress of language from barbarism to refinement, from the assumed authority of writers, this accumulation of meanings is inevitable. However precise the primitive signification of words may have been, imagination, passion, or feeling would readily train them to deflect from their original import, under the effusions of the "poet, the lunatic, or the lover." A correct etymology would unfold the rude and simple origin of many words, that our Anglo-saxon, and Norman ancestors have bequeathed to us; although we are now but little sensible of the legacy; as the great mass feels no inclination to revert to the source of derivation. Many have been distorted by corruption, and these are the most difficult to trace: to which may be added, that the terms we now employ to express our feelings and passions, and all that depicts mind and its operations, are of a figurative or metaphorical origin. Instead of any word being insignificant, there is no one but may become the keystone in a sentence; and therefore a word blotted out in a perspicuous, that is, a properly constructed sentence, would render it unintelligible. To the composition of a sentence, whatever may be the thought, certain words are absolutely necessary, each containing an individual meaning; which, like a sum in addition, composed of different units, each possessing a separate and intrinsic value, may, when added together, produce the total. To those who have not attentively considered the subject, there is considerable difficulty in understanding how a determinate number of words can include the intelligence contained in a proposition or sentence: and especially how these components of separate significations can become connected for such general and comprehensive meaning. It should be recollected that such is the amazing inclosure of language, that it comprehends all the living and inanimate materials of this world, all that perception can detect, memory recall, or thought elaborate. This exposition includes the present posture of human affairs, and the movements we observe:—much that has heretofore occurred, which the characters of language have preserved unfaded from dark and remote ages: and are competent to transmit to a distant posterity, with accumulated interest: all that experience has amassed, accompanied with the consoling promises of the future, which Revelation has unfolded. The extended empire of speech, and its perpetuating characters, embrace this prodigious range; but their comprehension is exclusively limited to the human race. When words can represent all that is evident and all that is conjectural—the works of Omnipotence, and the fabrications of man—we need to seek no further for the necessary materials of thought. The difficulty that has perplexed many persons respecting the compactness and unity of intelligence that a sentence contains, principally arises from their ignorance of the precise meaning of individual words. Etymologists would employ them in their original sense, and consider themselves justified by referring to their primitive import: others would use them according to their ordinary acceptation, which may be perverted; for in the currency of language, much is defective and counterfeit: but in general the authority of writers who are accredited, however they may disagree, is adopted. The intrinsic meaning of many words, especially the particles, will appear obscure; because they are disguised abbreviations of other words, and, in some instances, are sunk so deeply, that they cannot be fathomed. A protracted life might now be consumed in the investigation of these convenient and necessary particles, including the voluminous efforts of those illustrious grammarians who have terminated their discordant labours, without arriving at their primitive signification. The chemical elements of matter have undergone various reforms, and actual revolutions, and still await ulterior confusion.

The clearness of the thought will be manifested by the perspicuity of the sentence that expresses it. Whatever may be related, is most readily comprehended, when detailed in the strict order of its occurrence. If a procession be described, the exact sequence of its train must be noted, otherwise it will become a confused mixture of persons, or a mob. The same regularity is required in the construction of a sentence; and it appears fortunate that the English language reconciles this direct location of words, on which, its conformity to natural events and human transactions principally depends. From this straight-forward expression of meaning we may expect a future excellence of composition, and a more direct elaboration of thought. This distant prospect which imagination paints, and hope promotes, can only be realized under a system where light streams uncontrolled, and the atmosphere we breathe is free. The spirit of liberty must preside where improvement is expected. When we have acquired the power and habit of original thinking, the most important part of education, the mind is emancipated, and its independence commences: we cease to be espaliers, and become standards. Hitherto we have been principally trained according to the ancient models. The Greek and Latin historians, orators, and poets, have consumed, to a great extent, the docile season of youth: when perception is active, and memory most permanently retains its various deposits, to the dereliction of the great presentations of Nature, the operations of numbers, the foundations of science, and more especially the exercise of thought. After we have quitted school, and commenced our career of profitable employment, these studies are seldom continued, and from desuetude are soon forgotten; or only revived, perhaps unaptly, in an occasional quotation. Even a living language, when not exercised, fades from the recollection. The indirect location of words which prevails in Latin, can be no model for English composition, where regular and consecutive meaning constitute the perspicuity of the sentence; and according to the reasoning that has been adopted, of the thought itself. Words, and the meaning which resides in each individual, are the only media by which our thoughts can be conveyed; and if these, which are connected by sense and subject, are so separated, or dislocated, that it becomes a puzzle to reduce them to their natural order, such distraction ought not to be considered an example for the process of thinking, and its development by composition or construction of sentences in the English language. The connexion that exists in a perspicuous sentence, is the conjunction of meaning, a further proof of the individual signification of words, and which bearing a definite sense, are selected for the purpose of that composition, which we term the process of thinking. To this connexion we are directed by the knowledge we possess of any particular subject, when we are intently occupied in its investigation, with a view to confute or confirm it, or by a more successful effort to arrive at discovery: and these acts of thought involve the continuation of meaning by the addition of words adapted to fulfil such intention.

Connexion, in a great degree, is the contrivance of our own minds, and has been frequently confounded with successive occurrences, many of which, on examination, are detected to be in no manner related; most persons link together circumstances that ought to be kept apart, and which often prove the source of unsurmountable prejudices.

It will scarcely be contended, that the order of time establishes such concatenation, although it forms the basis of historical narrative. Each portion of time must be individual and distinct, and essentially consists in its subdivisions: indeed, if we were to fuse together hours, days and years, our existence would only amount to a tedious dream. The letters of the alphabet are insulated symbols, and have no natural connexion with each other, but may be arranged to constitute words, which possess a definite meaning. Words are in the same situation, there is no connexion in a vocabulary; they resemble the individuals of our species. Each is a separate being, charged with his own propensities and peculiar character; but he may become connected with others in friendship, in interest, or as the member of a society for particular objects: he may confederate with immense bodies, for the protection of his rights, or become part of an army for the destruction of his neighbours. Thus one philosophical system, in pamphlets or in formidable volumes, endeavours to overturn another: but the words are individual, and have no tendency to associate until they are enlisted and disciplined into the composition of sentences.