I shall be told that this is an untenable position, that a foundation must be laid upon which to build our action and our works, that it is impossible to live by contradictions, that unity and clarity are essential conditions of life and thought, and that it is necessary to unify thought. And this leaves us as we were before. For it is precisely this inner contradiction that unifies my life and gives it its practical purpose. Or rather it is the conflict itself, it is this self-same passionate uncertainty, that unifies my action and makes me live and work. We think in order that we may live, I have said; but perhaps it were more correct to say that we think because we live, and the form of our thought corresponds with that of our life. Once more I must repeat that our ethical and philosophical doctrines in general are usually merely the justification _a posteriori_ of our conduct, of our actions. Our doctrines are usually the means we seek in order to explain and justify to others and to ourselves our own mode of action. And this, be it observed, not merely for others, but for ourselves. The man who does not really know why he acts as he does and not otherwise, feels the necessity of explaining to himself the motive of his action and so he forges a motive. What we believe to be the motives of our conduct are usually but the pretexts for it. The very same reason which one man may regard as a motive for taking care to prolong his life may be regarded by another man as a motive for shooting himself. Nevertheless it cannot be denied that reasons, ideas, have an influence upon human actions, and sometimes even determine them, by a process analogous to that of suggestion upon a hypnotized person, and this is so because of the tendency in every idea to resolve itself into action--an idea being simply an inchoate or abortive act. It was this notion that suggested to Fouillée his theory of idea-forces. But ordinarily ideas are forces which we accommodate to other forces, deeper and much less conscious. But putting all this aside for the present, what I wish to establish is that uncertainty, doubt, perpetual wrestling with the mystery of our final destiny, mental despair, and the lack of any solid and stable dogmatic foundation, may be the basis of an ethic.