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

Galileo Galilei

Two truths cannot contradict one another.

Galileo Galilei

Where the senses fail us, reason must step in.

Galileo Galilei

Nature is written in mathematical language.

Galileo Galilei

Holy Scripture could never lie or err...its decrees are of absolute and inviolable truth.

Galileo Galilei

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

Galileo Galilei

Nature...does not act by means of many things when it can do so by means of a few.

Galileo Galilei

Mathematics is the language with which God has written the universe.

Galileo Galilei

Knowing thyself, that is the greatest wisdom.

Galileo Galilei

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

Galileo Galilei

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

Galileo Galilei

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

Galileo Galilei