Just as civic honour--in other words, the opinion that we deserve to be trusted--is the palladium of those whose endeavour it is to make their way in the world on the path of honourable business, so knightly honour--in other words, the opinion that we are men to be feared--is the palladium of those who aim at going through life on the path of violence; and so it was that knightly honour arose among the robber-knights and other knights of the Middle Ages. * * * * * A theoretical philosopher is one who can supply in the shape of ideas for the reason, a copy of the presentations of experience; just as what the painter sees he can reproduce on canvas; the sculptor, in marble; the poet, in pictures for the imagination, though they are pictures which he supplies only in sowing the ideas from which they sprang. A so-called practical philosopher, on the other hand, is one who, contrarily, deduces his action from ideas. The theoretical philosopher transforms life into ideas. The practical philosopher transforms ideas into life; he acts, therefore, in a thoroughly reasonable manner; he is consistent, regular, deliberate; he is never hasty or passionate; he never allows himself to be influenced by the impression of the moment. And indeed, when we find ourselves among those full presentations of experience, or real objects, to which the body belongs--since the body is only an objectified will, the shape which the will assumes in the material world--it is difficult to let our bodies be guided, not by those presentations, but by a mere image of them, by cold, colourless ideas, which are related to experience as the shadow of Orcus to life; and yet this is the only way in which we can avoid doing things of which we may have to repent. The theoretical philosopher enriches the domain of reason by adding to it; the practical philosopher draws upon it, and makes it serve him. * * * * * According to Kant the truth of experience is only a hypothetical truth. If the suppositions which underlie all the intimations of experience--subject, object, time, space and causality--were removed, none of those intimations would contain a word of truth. In other words, experience is only a phenomenon; it is not knowledge of the thing-in-itself. If we find something in our own conduct at which we are secretly pleased, although we cannot reconcile it with experience, seeing that if we were to follow the guidance of experience we should have to do precisely the opposite, we must not allow this to put us out; otherwise we should be ascribing an authority to experience which it does not deserve, for all that it teaches rests upon a mere supposition. This is the general tendency of the Kantian Ethics. * * * * *