You believe that you can bridge it over by induction. The idea of cause once found in ourselves, induction applies it, you say, wherever a new phenomenon appears. But let us not be deceived by words, and let us account for this extraordinary induction. The following dilemma I submit with confidence to the loyal dialectics of M. de Biran: Is the induction of which you speak universal and necessary? Then it is a different name for the same thing. An induction which forces us universally and necessarily to associate the idea of cause with that of every phenomenon that begins to appear is precisely what is called the principle of causality. On the contrary, is this induction neither universal nor necessary? It cannot supply the place of the principle of cause, and the explanation destroys the thing to be explained. It follows from this that the only true result of these various psychological investigations is, that the idea of personal and free cause precedes all exercise of the principle of causality, but without explaining it. The theory which we combat is much more powerless in regard to other principles which, far from being exercised before the ideas from which it is pretended to deduce them, precede them, and even give birth to them. How have we acquired the idea of time and that of space, except by aid of the principle that the bodies and events, which we see are in time and in space? We have seen[32] that, without this principle, and confined to the data of the senses and consciousness, neither time nor space would exist for us. Whence have we deduced the idea of the infinite, except from the principle that the finite supposes the infinite, that all finite and defective things, which we perceive by our senses and feel within us, are not sufficient for themselves, and suppose something infinite and perfect? Omit the principle, and the idea of the infinite is destroyed. Evidently this idea is derived from the application of the principle, and it is not the principle which is derived from the idea.