From this fact follows the superiority of contemplative to practical knowledge, of pure theoretical speculation to experimentation, and to any kind of knowing that depends upon changes in things or that induces change in them. Pure knowing is pure beholding, viewing, noting. It is complete in itself. It looks for nothing beyond itself; it lacks nothing and hence has no aim or purpose. It is most emphatically its own excuse for being. Indeed, pure contemplative knowing is so much the most truly self-enclosed and self-sufficient thing in the universe that it is the highest and indeed the only attribute that can be ascribed to God, the Highest Being in the scale of Being. Man himself is divine in the rare moments when he attains to purely self-sufficient theoretical insight.
In contrast with such knowing, the so-called knowing of the artisan is base. He has to bring about changes in things, in wood and stone, and this fact is of itself evidence that his material is deficient in Being. What condemns his knowledge even more is the fact that it is not disinterestedly for its own sake. It has reference to results to be attained, food, clothing, shelter, etc. It is concerned with things that perish, the body and its needs. It thus has an ulterior aim, and one which itself testifies to imperfection. For want, desire, affection of every sort, indicate lack. Where there is need and desire—as in the case of all practical knowledge and activity—there is incompleteness and insufficiency. While civic or political and moral knowledge rank higher than do the conceptions of the artisan, yet intrinsically considered they are a low and untrue type. Moral and political action is practical; that is, it implies needs and effort to satisfy them. It has an end beyond itself. Moreover, the very fact of association shows lack of self-sufficiency; it shows dependence upon others. Pure knowing is alone solitary, and capable of being carried on in complete, self-sufficing independence.
In short, the measure of the worth of knowledge according to Aristotle, whose views are here summarized, is the degree in which it is purely contemplative. The highest degree is attained in knowing ultimate Ideal Being, pure Mind. This is Ideal, the Form of Forms, because it has no lacks, no needs, and experiences no change or variety. It has no desires because in it all desires are consummated. Since it is perfect Being, it is perfect Mind and perfect Bliss;—the acme of rationality and ideality. One point more and the argument is completed. The kind of knowing that concerns itself with this ultimate reality (which is also ultimate ideality) is philosophy. Philosophy is therefore the last and highest term in pure contemplation. Whatever may be said for any other kind of knowledge, philosophy is self-enclosed. It has nothing to do beyond itself; it has no aim or purpose or function—except to be philosophy—that is, pure, self-sufficing beholding of ultimate reality. There is of course such a thing as philosophic study which falls short of this perfection. Where there is learning, there is change and becoming. But the function of study and learning of philosophy is, as Plato put it, to convert the eye of the soul from dwelling contentedly upon the images of things, upon the inferior realities that are born and that decay, and to lead it to the intuition of supernal and eternal Being. Thus the mind of the knower is transformed. It becomes assimilated to what it knows.
Through a variety of channels, especially Neo-Platonism and St. Augustine, these ideas found their way into Christian theology; and great scholastic thinkers taught that the end of man is to know True Being, that knowledge is contemplative, that True Being is pure Immaterial Mind, and to know it is Bliss and Salvation. While this knowledge cannot be achieved in this stage of life nor without supernatural aid, yet so far as it is accomplished it assimilates the human mind to the divine essence and so constitutes salvation. Through this taking over of the conception of knowledge as Contemplative into the dominant religion of Europe, multitudes were affected who were totally innocent of theoretical philosophy. There was bequeathed to generations of thinkers as an unquestioned axiom the idea that knowledge is intrinsically a mere beholding or viewing of reality—the spectator conception of knowledge. So deeply engrained was this idea that it prevailed for centuries after the actual progress of science had demonstrated that knowledge is power to transform the world, and centuries after the practice of effective knowledge had adopted the method of experimentation.
Let us turn abruptly from this conception of the measure of true knowledge and the nature of true philosophy to the existing practice of knowledge. Nowadays if a man, say a physicist or chemist, wants to know something, the last thing he does is merely to contemplate. He does not look in however earnest and prolonged way upon the object expecting that thereby he will detect its fixed and characteristic form. He does not expect any amount of such aloof scrutiny to reveal to him any secrets. He proceeds to do something, to bring some energy to bear upon the substance to see how it reacts; he places it under unusual conditions in order to induce some change. While the astronomer cannot change the remote stars, even he no longer merely gazes. If he cannot change the stars themselves, he can at least by lens and prism change their light as it reaches the earth; he can lay traps for discovering changes which would otherwise escape notice. Instead of taking an antagonistic attitude toward change and denying it to the stars because of their divinity and perfection, he is on constant and alert watch to find some change through which he can form an inference as to the formation of stars and systems of stars.
Change in short is no longer looked upon as a fall from grace, as a lapse from reality or a sign of imperfection of Being. Modern science no longer tries to find some fixed form or essence behind each process of change. Rather, the experimental method tries to break down apparent fixities and to induce changes. The form that remains unchanged to sense, the form of seed or tree, is regarded not as the key to knowledge of the thing, but as a wall, an obstruction to be broken down. Consequently the scientific man experiments with this and that agency applied to this and that condition until something begins to happen; until there is, as we say, something doing. He assumes that there is change going on all the time, that there is movement within each thing in seeming repose; and that since the process is veiled from perception the way to know it is to bring the thing into novel circumstances until change becomes evident. In short, the thing which is to be accepted and paid heed to is not what is originally given but that which emerges after the thing has been set under a great variety of circumstances in order to see how it behaves.
Now this marks a much more general change in the human attitude than perhaps appears at first sight. It signifies nothing less than that the world or any part of it as it presents itself at a given time is accepted or acquiesced in only as material for change. It is accepted precisely as the carpenter, say, accepts things as he finds them. If he took them as things to be observed and noted for their own sake, he never would be a carpenter. He would observe, describe, record the structures, forms and changes which things exhibit to him, and leave the matter there. If perchance some of the changes going on should present him with a shelter, so much the better. But what makes the carpenter a builder is the fact that he notes things not just as objects in themselves, but with reference to what he wants to do to them and with them; to the end he has in mind. Fitness to effect certain special changes that he wishes to see accomplished is what concerns him in the wood and stones and iron which he observes. His attention is directed to the changes they undergo and the changes they make other things undergo so that he may select that combination of changes which will yield him his desired result. It is only by these processes of active manipulation of things in order to realize his purpose that he discovers what the properties of things are. If he foregoes his own purpose and in the name of a meek and humble subscription to things as they "really are" refuses to bend things as they "are" to his own purpose, he not only never achieves his purpose but he never learns what the things themselves are. They are what they can do and what can be done with them,—things that can be found by deliberate trying.
The outcome of this idea of the right way to know is a profound modification in man's attitude toward the natural world. Under differing social conditions, the older or classic conception sometimes bred resignation and submission; sometimes contempt and desire to escape; sometimes, notably in the case of the Greeks, a keen esthetic curiosity which showed itself in acute noting of all the traits of given objects. In fact, the whole conception of knowledge as beholding and noting is fundamentally an idea connected with esthetic enjoyment and appreciation where the environment is beautiful and life is serene, and with esthetic repulsion and depreciation where life is troubled, nature morose and hard. But in the degree in which the active conception of knowledge prevails, and the environment is regarded as something that has to be changed in order to be truly known, men are imbued with courage, with what may almost be termed an aggressive attitude toward nature. The latter becomes plastic, something to be subjected to human uses. The moral disposition toward change is deeply modified. This loses its pathos, it ceases to be haunted with melancholy through suggesting only decay and loss. Change becomes significant of new possibilities and ends to be attained; it becomes prophetic of a better future. Change is associated with progress rather than with lapse and fall. Since changes are going on anyway, the great thing is to learn enough about them so that we be able to lay hold of them and turn them in the direction of our desires. Conditions and events are neither to be fled from nor passively acquiesced in; they are to be utilized and directed. They are either obstacles to our ends or else means for their accomplishment. In a profound sense knowing ceases to be contemplative and becomes practical.
Unfortunately men, educated men, cultivated men in particular, are still so dominated by the older conception of an aloof and self-sufficing reason and knowledge that they refuse to perceive the import of this doctrine. They think they are sustaining the cause of impartial, thorough-going and disinterested reflection when they maintain the traditional philosophy of intellectualism—that is, of knowing as something self-sufficing and self-enclosed. But in truth, historic intellectualism, the spectator view of knowledge, is a purely compensatory doctrine which men of an intellectual turn have built up to console themselves for the actual and social impotency of the calling of thought to which they are devoted. Forbidden by conditions and held back by lack of courage from making their knowledge a factor in the determination of the course of events, they have sought a refuge of complacency in the notion that knowing is something too sublime to be contaminated by contact with things of change and practice. They have transformed knowing into a morally irresponsible estheticism. The true import of the doctrine of the operative or practical character of knowing, of intelligence, is objective. It means that the structures and objects which science and philosophy set up in contrast to the things and events of concrete daily experience do not constitute a realm apart in which rational contemplation may rest satisfied; it means that they represent the selected obstacles, material means and ideal methods of giving direction to that change which is bound to occur anyway.