I did not myself see clearly at the time, that the adaptation of Christianity to man's wants, to man's nature, and its tendency to promote man's temporal as well as his spiritual welfare, was really a proof of its divine origin. I saw that it was a valid answer to the infidel objection that it was useless or mischievous; but not that it was a decisive proof of its divinity. Hence though I employed it as a refutation of infidel charges against Christianity, I never pressed it further. And though I got at length much larger views of the excellency of Christianity than those presented by Soame Jenyns, I saw not half, I saw not a tenth of its worth and glory. I saw not a tenth even of what I see now. I now see there are no limits to the excellency of Christianity, or to the power of the argument supplied by its glorious character, in proof of its divinity. And the worth and excellency of Christianity you can carry continually in your mind. They present themselves whenever you open the Gospels, or look at Jesus. They move you whenever you think of the happy effect Christianity has had on your own hearts and lives. They come to your minds whenever you look on the prevailing vices and miseries of society, which result from a want of Christianity. They touch your heart, as well as convince your judgment. But I neither saw them in their true light nor in their full extent before I fell into doubt; so that they were unable to make up for the deficiency in the external evidences, and to check my growing tendency to unbelief. 19. There were other influences that helped me down to unbelief. Negative criticism, pulling things to pieces with a view to find faults, to which our modern philosophers give the fine name of _Analysis_, tends to cause doubt about every thing. It eats out of one the very soul of truth, of love, and of faith. It tends naturally to kill all our good instincts and natural affections, and to render not only religion, but philosophy, virtue and happiness impossible. The Cartesian system of reasoning, which begins by calling in question every thing, and which refuses to believe anything without formal proof, is essentially vicious. The man who adopts it and carries it out thoroughly, must necessarily become an infidel, not only in religion, but in morals and philosophy. And he must become intolerably miserable, and destroy himself, unless, like John S. Mill, he can find out some method of deceiving himself.