Other Galileo Galilei quotes:
The greatest wisdom is to get to know oneself.
You cannot teach a man anything; you can only help him to find it within himself.
I have never met a man so ignorant that I couldn't learn something from him.
Nothing can be taught to a man, only it's possibly to help him to discover it inside.
Where the senses fail us, reason must step in.
Knowing thyself, that is the greatest wisdom.
All truths are easy to understand once they are discovered; the point is to discover them.
Measure what can be measured, and make measurable what cannot be measured.
Measure what is measurable, and make measurable what is not so.