I now therefore resume my course of argument. God is neither an object of experience, nor yet of demonstration properly so called. In the view of science, as it is commonly understood, of science which follows out the chain of its deductions, without giving attention to the very foundations of all the work of the reason,--God, that chief of all realities for a believing heart, that experience of every hour, that evidence superior to all proof, God is an hypothesis. I grant it. Hence it is inferred that God has no place in science, for that hypothesis has no place in a science worthy of the name. But this I deny; and in support of this denial I proceed to show that the hypothesis which it is pretended to get quit of, is the generating principle of all human knowledge. Whence does science proceed? Does it result from mere experience? No. What does experience teach us when quite alone? Nothing. Experience, separated from all element of reason, only reveals to us our own sensations. This, a Scotch philosopher, Hume, has proved to demonstration,--a demonstration which constitutes his glory. It is easy, without having even a smattering of philosophy, to understand quite well that science is formed by thought. Now, if we did not possess the faculty of thinking, it would not be given to us by experience. Thought does not enter by the eye or the ear. Imagine a living body not possessed of reason: its eye will reflect objects like a mirror, its tympanum will vibrate to the undulations of the air; but it will have no thoughts, and will know nothing. Is science formed by pure reason? No. No one can say what pure reason is, for the exercise of our thought is connected indissolubly with experience. But, without pausing at this consideration, let us ask what pure reason can do, if deprived of all objects of experience? One thing only, namely, take cognizance of itself. Now the reason, in taking cognizance of itself, only creates logic, that is to say, the theory of the laws of knowledge. Some philosophers, to be sure, have undertaken to prove that reason, by dint of self-contemplation, might arrive at the knowledge of all things. They have maintained that all the secrets of the universe are contained in our thought, and that by just reasoning one may form the science of astronomy without looking at the stars, and write the history of the human race without taking the trouble to search laboriously into the annals of the past. But these attempts to _construct_ facts, instead of observing them, have succeeded too ill to merit very serious attention.