Although every novel is derived directly from another novel, there is really only one novel, the Quixote.

Darwinism is not a sufficient condition for a phenomenon like Nazism but I think it's certainly a necessary one.

The desire to see and the desire to ratify what one has seen are desires at odds with one another, if only because they proceed from separate places in the imagination.

"Young men wish always to dream of what they have lost." "And old men?" "Of what they have not found."

Some philosophers see into themselves, and some into their times; still others forge an alliance with the future.

Arithmetic is where the content lies, and not logic; but logic prompts certainty, and not arithmetic.

No man is obliged to be what he might have been.

The calculus is the story this [the Western] world first told itself as it became the modern world.

I do not know whether any of this is true. I am certain that the scientific community does not know that it is false.

Aristotelian logic is massive and marmoreal, but every monument accumulates graffiti.

In the end, every scheme and every science is justified by itself or it is not justified at all.

The warrior of the night intercedes for the people.

True worship, worship that is pleasing to God, radiates throughout a person's entire life.

Always, however brutal an age may actually have been, its style transmits its music only.

The funniest people are the saddest once

Youth is about the only thing worth having, and that is about the only thing youth has.

I wasn't concerned about the hardships because I always felt I was doing what I had to do, what I wanted to do and what I was destined to do.

I put God first and do not allow other things to cloud my vision.

Hypocrites weep, and you cannot tell their tears from those of saints; but no bad man ever laughed sweetly yet.

Spacemen - men who work in space, pilots and jetmen and astrogators and such - are men who like a few million miles of elbow room.

Trust is precious and easily wasted, and guessing is a lousy foundation for future progress.