As society advances, social interest must consist more and more in free devotion to intelligence for its own sake, to science, art and industry, and in rejoicing in the exercise of such freedom by others. Meantime, it is truth which makes free. See Spencer, Data of Ethics, pp. 249-257, where this doctrine is stated with great force. Where, finally, does the social character of science and art come in? Just here: they are elements in the perfection of individuality, and they are elements whose very nature is to be moving, not rigid; distributed from one to another and not monopolistic possessions. If there are forms of science and art which, at present, are static, being merely owned collections of facts, as one may have a collection of butterflies in a frame, or of etchings in a closed portfolio, this is not because they are science and art, but imperfect science and art. To complete their scientific and artistic character is to set these facts in motion; to hurl them against the world of physical forces till new instruments of man's activity are formed, and to set them in circulation so that others may also participate in their truth and rejoice in their beauty. So far as scientific or artistic attainments are treasured as individual possessions, so far it _is_ true that they are not social--but so far it is _also_ true that they are immoral: indeed that they are not fully scientific or artistic, being subordinated to having certain sensations. The intellectual movement of the last four or five centuries has resulted in an infinite specialization in methods, and in an immense accumulation of fact. It is quite true, since the diversity of fact and of method has not yet been brought to an organic unity, that their social bearing is not yet realized. But when the unity is attained (as attained it must be if there is unity in the object of knowledge), it will pass into a corresponding unity of practice. And then the question as to the social character of even the most specialized knowledge will seem absurd. It will be to ask whether men can coöperate better when they do not know than when they do know what they want. Meantime the intellectual confusion, and the resulting divorce of knowledge from practice, exists. But this constitutes a part of the environment of which action must take heed. It makes it one of the pressing duties that every man of intelligence should do his part in bringing out the public and common aspects of knowledge. _The_ duty of the present is the socializing of intelligence--the realizing of its bearing upon social practice. XL. The Ethical Postulate.