But you see how man is also machine, and it suffices to turn one wheel on the surface and other wheels then turn inside: the brother and the enmity are merely the reflection of the fear that each man has of himself, of the recesses of his own soul, where unconfessed desires lurk, or, as they are saying in Paris, unconscious concepts. For it has been demonstrated that imperceptible thoughts exist, affecting the soul without the soul's being aware of them, clandestine thoughts whose existence is demonstrated by the fact that, however little each of us examines himself, he will not fail to remark that in his heart he bears love or hatred, joy or sorrow, while remaining unable to remember distinctly the thoughts that generated it.