Man's sensitivity to the little things and insensitivity to the greatest are the signs of a strange disorder.

Man is so made that by continually telling him he is a fool he believes it, and by continually telling it to himself he makes himself believe it. For man holds an inward talk with himself, which it pays him to regulate.

If man should commence by studying himself, he would see how impossible it is to go further.

Unless we love the truth we cannot know it.

We must learn our limits. We are all something, but none of us are everything.

Vanity is but the surface.

No one is offended at not seeing everything; but one does not like to be mistaken, and that perhaps arises from the fact that man naturally cannot see everything, and that naturally he cannot err in the side he looks at, since the perceptions of our senses are always true.