Galileo Galilei

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

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

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

We cannot teach people anything; we can only help them discover it within themselves.