I can readily conceive of a man without hands or feet; and I could conceive of him without a head, if experience had not taught me that by this he thinks, Thought then, is the essence of man, and without this we cannot conceive of him.

Man is so great that his greatness appears even in the consciousness of his misery. A tree does not know itself to be miserable. It is true that it is misery indeed to know one's self to be miserable; but then it is greatness also. In this way, all man's miseries go to prove his greatness. They are the miseries of a mighty potentate, of a dethroned monarch.

In each action we must look beyond the action at our past, present, and future state, and at others whom it affects, and see the relations of all those things. And then we shall be very cautious.

The Fall is an offense to human reason, but once accepted, it makes perfect sense of the human condition.

If there is a God, He is infinitely incomprehensible, since, having, neither parts nor limits, He has no affinity to us. We are then incapable of knowing either what He is or if He is. [So] you must wager. Let us weigh the gain and the loss in wagering that God is. Let us estimate these two chances. If you gain, you gain all; if you lose, you lose nothing. Wager then without hesitation that he is.

Let us, then, take our compass; we are something, and we are not everything. The nature of our existence hides from us the knowledge of first beginnings which are born of the nothing; and the littleness of our being conceals from us the sight of the infinite. Our intellect holds the same position in the world of thought as our body occupies in the expanse of nature.

If you want to be a real seeker of truth, you need to, at least once in your lifetime, doubt in, as much as it's possible, in everything.