Measure what is measurable, and make measurable what is...
Quote by Galileo Galilei about opinion, measure
By denying scientific principles, one may maintain any...
Quote by Galileo Galilei about science
You cannot teach a man anything; you can only help him...
Quote by Galileo Galilei about people, help, man
I have never met a man so ignorant that I couldn't learn...
Quote by Galileo Galilei about ignorance, man