THREE:Timon, a celebrated disciple of Pyrrho, added another and, from the speculative point of view, a much more powerful argument, which, however, may equally have been139 borrowed from the masters lectures. Readers of the Posterior Analytics will remember how strongly Aristotle dwells on the necessity of starting with first principles which are self-evidently true. The chain of demonstration must have something to hang on, it cannot be carried back ad infinitum. Now, Timon would not admit of such a thing as first principles. Every assumption, he says, must rest on some previous assumption, and as this process cannot be continued for ever, there can be no demonstration at all. This became a very favourite weapon with the later Sceptics, and, still at the suggestion of Aristotle, they added the further trope of compelling their adversaries to choose between going back ad infinitum and reasoning in a circlein other words, proving the premises by means of the conclusion. Modern science would not feel much appalled by the sceptical dilemma. Its actual first principles are only provisionally assumed as ultimate, and it is impossible for us to tell how much farther their analysis may be pursued; while, again, their validity is guaranteed by the circular process of showing that the consequences deduced from them agree with the facts of experience. But as against those modern philosophers who, in adherence to the Aristotelian tradition, still seek to base their systems on first principles independent of any individual experience, the sceptical argument is unanswerable, and has even been strengthened by the progress of knowledge. To this day, thinkers of different schools cannot agree about the foundations of belief, and what to one seems self-evidently true, is to another either conceivably or actually false. To Mr. Herbert Spencer the persistence of force is a necessary truth; to Prof. Stanley Jevons its creation is a perfectly possible contingency; while to others, again, the whole conception of force, as understood by Mr. Spencer, is so absolutely unmeaning that they would decline to entertain any proposition about the invariability of the objective reality which it is supposed to represent. And when the140 priori dogmatist affects to treat the negations of his opponents as something that they do not think, but only think they think, they may, with perfect fairness, attribute his rejection of their beliefsas, for example, free-willto a similar subjective illusion. Moreover, the pure experimentalists can point to a circumstance not foreseen by the ancient sceptics, which is that propositions once generally regarded as incontrovertible by thinking men, are now as generally abandoned by them.The theological interest and the scholastic interest, though not necessarily associated, have, as already observed, a point of contact in their common exaltation of authority. Thus, for our present purpose they may be classified under the more general notion of traditionalism. By this term I understand a disposition to accept as true opinions received either by the mass of mankind or by the best accredited teachers, and to throw these opinions into a form adapted for easy transmission to others. In this sense, traditionalism is Janus-faced, looking on one side to the past and on the other to the future. Now philosophy could only gain general acceptance by becoming a tradition. For a long time the Greek thinkers busied themselves almost exclusively with the discovery of truth, remaining comparatively indifferent to its diffusion. As Plato says, they went their own way without caring whether they took us along with them or not.3 And it was at this period that the most valuable speculative ideas were first originated. At last a strong desire arose among the higher classes to profit by the results of the new learning, and a class of men came into existence whose profession was to gratify this desire. But the Sophists, as they were called,xiii soon found that lessons in the art of life were more highly appreciated and more liberally rewarded than lessons in the constitution of Nature. Accordingly, with the facile ingenuity of Greeks, they set to work proving, first that Nature could not be known, and finally that there was no such thing as Nature at all. The real philosophers were driven to secure their position by a change of front. They became teachers themselves, disguising their lessons, however, under the form of a search after truth undertaken conjointly with their friends, who, of course, were not expected to pay for the privilege of giving their assistance, and giving it for so admirable a purpose. In this co-operative system, the person who led the conversation was particularly careful to show that his conclusions followed directly from the admissions of his interlocutors, being, so to speak, latent in their minds, and only needing a little obstetric assistance on his part to bring them into the light of day. And the better to rivet their attention, he chose for the subject of discussion questions of human interest, or else, when the conversation turned to physical phenomena, he led the way towards a teleological or aesthetical interpretation of their meaning.
