It is just as important to make knowledge live and keep it alive as to solve specific problems.

Classical thermodynamics ... is the only physical theory of universal content which I am convinced ... will never be overthrown.

When you examine the lives of the most influential people who have ever walked among us, you discover one thread that winds through them all. They have been aligned first with their spiritual nature and only then with their physical selves.

You can't resolve a dilemma with all the very same mind that made it

Whoever is careless with the truth in small matters cannot be trusted in important affairs.

[Newton wrote to Halley ... that he would not give Hooke any credit] That, alas, is vanity. You find it in so many scientists. You know, it has always hurt me to think that Galileo did not acknowledge the work of Kepler.

Student is not a container you have to fill but a torch you have to light up.