To the impartial man, the Truth has always been a heart-stirring word and one of great import. As to the assertion that the Truth cannot be known, we shall consider it more closely in the history of Philosophy itself where it appears. The only thing to be here remarked is that if this assumption be allowed, as was the case with Tennemann, it is beyond conception why anyone should still trouble about Philosophy, since each opinion asserts falsely in its turn that it has found the truth. This immediately recalls to me the old belief that Truth consists in knowledge, but that an individual only knows the Truth in so far as he reflects and not as he walks and stands: and that the Truth cannot be known in immediate apprehension and perception, whether it be external and sensuous, or whether it be intellectual perception (for every perception as a perception is sensuous) but only through the labour of thought. b. _Proof of the futility of Philosophical Knowledge obtained through the History of Philosophy itself._ From another point of view another consequence ensues from the above conception of the history of Philosophy which may at will be looked at as an evil or a benefit. In view of such manifold opinions and philosophical systems so numerous, one is perplexed to know which one ought to be accepted. In regard to the great matters to which man is attracted and a knowledge of which Philosophy would bestow, it is evident that the greatest minds have erred, because they have been contradicted by others. “Since this has been so with minds so great, how then can _ego homuncio_ attempt to form a judgment?” This consequence, which ensues from the diversity in philosophical systems, is, as may be supposed, the evil in the matter, while at the same time it is a subjective good. For this diversity is the usual plea urged by those who, with an air of knowledge, wish to make a show of interest in Philosophy, to explain the fact that they, with this pretence of good-will, and, indeed, with added motive for working at the science, do in fact utterly neglect it. But this diversity in philosophical systems is far from being merely an evasive plea. It has far more weight as a genuine serious ground of argument against the zeal which Philosophy requires. It justifies its neglect and demonstrates conclusively the powerlessness of the endeavour to attain to philosophic knowledge of the truth. When it is admitted that Philosophy ought to be a real science, and one Philosophy must certainly be the true, the question arises as to which Philosophy it is, and when it can be known. Each one asserts its genuineness, each even gives different signs and tokens by which the Truth can be discovered; sober reflective thought must therefore hesitate to give its judgment.