The function of science fiction is not always to predict the future but sometimes to prevent it.
I hope that when I die, people say about me, 'Boy, that guy sure owed me a lot of money.'
For visions come not to polluted eyes.
Glory is fleeting, but obscurity is forever.
The true mystery of the world is the visible, not the invisible.
The knowledge of the world is only to be acquired in the world, and not in a closet.
I am careful not to confuse excellence with perfection. Excellence, I can reach for; perfection is God's business.