If we begin with what meets us in our very first conceptions, we cannot neglect to make mention of this aspect in the history of Philosophy. In its results it permeates culture generally, being at once the misconception and true sign of our times. It is the principle through which men mutually understand and know each other; an hypothesis whose value is established and which is the ground of all the other sciences. In theology it is not so much the creed of the church that passes for Christianity, as that every one to a greater or less degree makes a Christianity of his own to tally with his conviction. And in history we often see theology driven into acquiring the knowledge of various opinions in order that an interest may thus be furnished to the science, and one of the first results of the attention paid them is the honour awarded to all convictions, and the esteem vouchsafed to what has been constituted merely by the individual. The endeavour to know the Truth is then of course relinquished. It is true that personal conviction is the ultimate and absolute essential which reason and its philosophy, from a subjective point of view, demand in knowledge.
But there is a distinction between conviction when it, rests on subjective grounds such as feelings, speculations and perceptions, or, speaking generally, on the particular nature of the subject, and when it rests on thought proceeding from acquaintance with the Notion and the nature of the thing.
In the former case conviction is opinion.
This opposition between mere opinion and truth now sharply defined, we already recognize in the culture of the period of Socrates and Plato-a period of corruption in Greek life-as the Platonic opposition between opinion (doxa) and Science (episteme). It is the same opposition as that which existed in the decadence of Roman public and political life under Augustus, and subsequently when Epicureanism and indifference set themselves up against Philosophy. Under this influence, when Christ said, "I came into the world that I should bear witness unto the Truth,"Pilate answered, "What is Truth?" That was said in a superior way, and signifies that this idea of truth is an expedient which is obsolete: we have got further, we know that there is no longer any question about knowing the Truth, seeing that we have gone beyond it. Who makes this statement has gone beyond it indeed. If this is made our starting point in the history of Philosophy, its whole significance will consist in finding, out the particular ideas of others, each one of which is different from the other: these individual points of view are thus foreign to me: my thinking reason is not free, nor is it present in them: for me they are but extraneous, dead historic matter, or so much empty content, and to satisfy oneself with empty vanity is mere subjective vanity itself.
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.
