The problems that exist in this world can not be solved by the level of thinking that created them.

I have no special talent. I am only passionately curious.

There is no greater satisfaction for a just and well-meaning person than the knowledge that he has devoted his best energies to the service of the good cause.

Feeling and longing are the motive forces behind all human endeavor and human creations.

When you sit with a nice girl for two hours, it seems like two minutes; when you sit on a hot stove for two minutes, it seems like two hours. That's relativity.

Heroism on command, senseless violence, and all the loathsome nonsense that goes by the name of patriotism - how passionately I hate them!

I have not eaten enough of the tree of knowledge, though in my profession I am obligated to feed on it regularly.