See now the power of truth.

It is a beautiful and delightful sight to behold the body of the Moon.

By denying scientific principles, one may maintain any paradox.

The Milky Way is nothing else but a mass of innumerable stars planted together in clusters.

The book of nature is written in the language of mathematics.

Mathematics is the key and door to the sciences.

It is surely harmful to souls to make it a heresy to believe what is proved.

Measure what is measurable, and make measurable what is not so.

Wine is sunlight, held together by water.

Who would dare assert that we know all there is to be known?

You may force me to say what you wish; you may revile me for saying what I do. But it moves.

Nothing occurs contrary to nature except the impossible, and that never occurs.

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

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

You can't teach anybody anything, only make them realize the answers are already inside them.

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

Knowing thyself, that is the greatest wisdom.

Two truths cannot contradict one another.

Nonetheless, it moves.