We know truth, not only by the reason, but also by the heart.

Either God exists or He doesn't. Either I believe in God or I don't. Of the four possibilities, only one is to my disadvantage. To avoid that possibility, I believe in God.

Nothing gives rest but the sincere search for truth.

Let man reawake and consider what he is compared with the reality of things; regard himself lost in this remote corner of Nature; and from the tiny cell where he lodges, to wit the Universe, weigh at their true worth earth, kingdoms, towns, himself. What is a man face to face with infinity?

Lust is the source of all our actions, and humanity.

Nature, which alone is good, is wholly familiar and common.

The heart has its reasons of which reason knows nothing. We feel it in a thousand things. I say that the heart naturally loves the Universal Being, and naturally loves itself; and it gives itself to one or the other, and hardens itself against one or the other, as it chooses...it is the heart that feels God, not the reason; this is faith.