Quote by David Hilbert
"One must be willing to labor long and hard to find a beautiful proof."
More from David Hilbert
"Mathematics is the foundation of all exact knowledge of natural phenomena."
"One cannot escape the feeling that these mathematical formulas have an independent existence and an intelligence of their own."
"The art of doing mathematics consists in finding that special case which contains all the germs of generality."
"If I were to awaken after having slept for a thousand years, my first question would be: has the Riemann hypothesis been proven?"