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

- Galileo Galilei

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

- Galileo Galilei

Knowing thyself, that is the greatest wisdom.

- Galileo Galilei

Two truths cannot contradict one another.

- Galileo Galilei

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

- Galileo Galilei

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

- Galileo Galilei

There are those who reason well, but they are greatly outnumbered by those who reason badly.

- Galileo Galilei

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

- Galileo Galilei

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.

- Galileo Galilei