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

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

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

698  All truths are easy to understand once they are discovered; the point is to discover them. Read more at http://www.brainyquote.com/quotes/authors/g/galileo_galilei.html#rBJuUIcG4835fyiK.99

674  If I were again beginning my studies, I would follow the advice of Plato and start with mathematics.