I consider theology to be the rhetoric of morals.

I hate the prostitution of the name of friendship to signify modish and worldly alliances.

Art is the need to create; but in its essence, immense and universal, it is impatient of working with lame or tied hands, and of making cripples and monsters, such as all pictures and statues are. Nothing less than the creation of man and nature is its end.

Research is not seeing what others do not see, it is seeing the same thing as other people and thinking what they do not.

Wisdom is not found with those who dwell at their ease; rather nature, when she adds brain, adds difficulty.

The craft with which the world is made runs also into the mind and character of men. No man is quite sane; each has a vein of folly in his composition, a slight determination of blood to the head, to make sure of holding him hard to some one point which Nature has taken to heart.

Labor is God's education.