It would seem that men always need some idiotic fiction in the name of which they can hate one another. Once it was religion. Now it is the State.

In the middle of difficulties lie opportunities.

Hail to the man who went through life always helping others, knowing no fear, and to whom aggressiveness and resentment are alien. Such is the stuff of which the great moral leaders are made.

Be a loner. That gives you time to wonder, to search for the truth. Have holy curiosity. Make your life worth living.

Nothing that I can do or say will change the structure of the universe. But maybe, by raising my voice, I can help the greatest of all causes — good will among men and peace on earth.

It is impossible to solve significant problems using the same knowledge that created them.

Physics is an attempt conceptually to grasp reality as something that is considered to be independent of its being observed. In this sense one speaks of physical reality.