By denying scientific principles, one may maintain any paradox.

Measure what can be measured, and make measurable what cannot be measured.

All truths are easy to understand once they are discovered; the point is to discover them.

I have never met a man so ignorant that I couldn't learn something from him.

The sun, with all those planets revolving around it and dependent on it, can still ripen a bunch of grapes as if it had nothing else in the universe to do.

I do not feel obliged to believe that the same God who has endowed us with senses, reason, and intellect has intended us to forego their use.

The laws of nature are written by the hand of God in the language of mathematics.

Knowing thyself, that is the greatest wisdom.

To understand the Universe, you must understand the language in which it's written, the language of Mathematics.

In the sciences, the authority of thousands of opinions is not worth as much as one tiny spark of reason in an individual man.

To be humane, we must ever be ready to pronounce that wise, ingenious and modest statement 'I do not know'.

We are all brothers under the skin - and I, for one, would be willing to skin humanity to prove it.

I understand deficit spending. I was born in deficit spending.

No joy in nature is so sublimely affecting as the joy of a mother at the good fortune of a child.

Procrastination isn't the problem. It's the solution. It's the universe's way of saying stop, slow down, you move too fast.

The two main ideas that run through all of my writing, whether it be literary criticism or political polemic are these: I am strong in favor of liberty and I hate fraud.

Film is truth 24 times a second, and every cut is a lie.

Now may this little Book a blessing be To those that love this little Book, and me: And may its Buyer have no cause to say, His money is but lost, or thrown away.

Every painting is a war. You have to struggle every day, and to struggle every day with your inadequacies is a damn nuisance.

It is an insult to our citizens to question whether they are rational beings or not, and blasphemy against religion to suppose it cannot stand the test of truth and reason.

Teaching is not filling up a pail, it is lighting a fire.