Limus ut hic durescit, et hæc ut cera liquescit
Uno eodemque igni.
Metaphysics, to which word he gave a sense as remote from that which it bore in the Aristotelian schools, as from that in which it is commonly employed at present, had for its proper object the investigation of forms. It was “a generally received and inveterate opinion, that the inquisition of man is not competent to find out essential forms or true differences.” Formæ inventio, he says in another place, habetur pro desperata. The word form itself, being borrowed from the old philosophy, is not immediately intelligible to every reader. |Form of bodies.| “In the Baconian sense,” says Playfair, “form differs only from cause in being permanent, whereas, we apply cause to that which exists in order of time.” Form (natura naturans, as it was barbarously called) is the general law, or condition of existence, in any substance or quality (natura naturata), which is wherever its form is.[197] The conditions of a mathematical figure, prescribed in its definition, might in this sense be called its form, if it did not seem to be Lord Bacon’s intention to confine the word to the laws of particular sensible existences. In modern philosophy, it might be defined to be that particular combination of forces, which impresses a certain modification upon matter subjected to their influence.
[197] Licet enim in natura nihil vere existat præter corpora individua, edentia actus puros individuos ex lege, in doctrinis tamen illa ipsa lex, ejusque inquisitio, et inventio atque explicatio pro fundamento est tam ad sciendum quam operandum. Eam autem legem ejusque paragraphos, Formarum nomine intelligimus; præsertim cum hoc vocabulum invaluerit et familiariter occurrat. Nov. Org. ii. 2.
Might sometimes be inquired into. 50. To a knowledge of such forms, or laws of essence and existence, at least in a certain degree, it might be possible, in Bacon’s sanguine estimation of his own logic, for man to attain. Not that we could hope to understand the forms of complex beings, which are almost infinite in variety, but the simple and primary natures, which are combined in them. “To inquire the form of a lion, of an oak, of gold, nay of water, of air, is a vain pursuit; but to inquire the forms of sense, of voluntary motion, of vegetation, of colours, of gravity and levity, of density and tenuity, of heat, of cold, and all other natures and qualities, which, like an alphabet, are not many, and of which the essences, upheld by matter, of all creatures do consist; to inquire, I say, the true forms of these is that part of metaphysic which we now define of.”[198] Thus, in the words he soon afterwards uses, “of natural philosophy, the basis is natural history; the stage next the basis is physic; the stage next the vertical point is metaphysic. As for the vertical point, ‘Opus quod operatur Deos a principio usque ad finem,’ the summary law of nature, we know not whether man’s inquiry can attain unto it.”[199]
[198] In the Novum Organum he seems to have gone a little beyond this, and to have hoped that the form itself of concrete things might be known. Datæ autem naturæ formam, sive differentiam veram, sive naturam naturantem, sive fontem emanationis (ista enim vocabula habemus, quæ ad indicationem rei proxime accedunt), invenire opus et intentio est Humanæ Scientiæ. Lib. ii. 1.
[199] Advancement of Learning, book ii. This sentence he has scarcely altered in the Latin.
Final causes too much slighted. 51. The second object of metaphysics, according to Lord Bacon’s notion of the word, was the investigation of final causes. It is well known that he has spoken of this with unguarded disparagement.[200] “Like a virgin consecrated to God, it bears nothing;” one of those witty conceits that sparkle over his writings, but will not bear a severe examination. It has been well remarked that almost at the moment he published this, one of the most important discoveries of his age, the circulation of the blood, had rewarded the acuteness of Harvey in reasoning on the final cause of the valves in the veins.
[200] Causa finalis tantum abest ut prosit, ut etiam scientias corrumpat, nisi in hominis actionibus. Nov. Org. ii. 2. It must be remembered that Bacon had good reason to deprecate the admixture of theological dogmas with philosophy, which had been, and has often since been, the absolute perversion of all legitimate reasoning in science. See what Stewart has said upon Lord Bacon’s objection to reasoning from final causes in physics. Philosophy of the Active and Moral Powers, book iii., chap. 2, sect. 4.
Man not included by him in physics. 52. Nature, or physical philosophy, according to Lord Bacon’s partition, did not comprehend the human species. Whether this be not more consonant to popular language, adopted by preceding systems of philosophy, than to a strict and perspicuous arrangement, may by some be doubted; though a very respectable authority, that of Dugald Stewart, is opposed to including man in the province of physics. For it is surely strange to separate the physiology of the human body, as quite a science of another class, from that of inferior animals; and if we place this part of our being under the department of physical philosophy, we shall soon be embarrassed by what Bacon has called the “doctrina de fœdere,” the science of the connection between the soul of man and his bodily frame, a vast and interesting field, even yet very imperfectly explored.
Man, in body and mind. 53. It has pleased, however, the author to follow his own arrangement. The fourth book relates to the constitution, bodily and mental, of mankind. In this book he has introduced several subdivisions which, considered merely as such, do not always appear the most philosophical; but the pregnancy and acuteness of his observations under each head silences all criticism of this kind. This book has nearly double the extent of the corresponding pages in the Advancement of Learning. The doctrine as to the substance of the thinking principle having been very slightly touched, or rather passed over, with two curious disquisitions on divination and fascination, he advances in four ensuing books to the intellectual and moral faculties, and those sciences which immediately depend upon them. Logic and Ethics are the grand divisions, co-relative to the reason and the will of man. |Logic.| Logic, according to Lord Bacon, comprizes the sciences of inventing, judging, retaining, and delivering the conceptions of the mind. We invent, that is, discover new arts or new arguments; we judge by induction or by syllogism; the memory is capable of being aided by artificial methods. All these processes of the mind are the subjects of several sciences, which it was the peculiar aim of Bacon, by his own logic, to place on solid foundations.