When we are no longer able to change a situation - we are challenged to change ourselves.

Certainty? In this world nothing is certain but death and taxes.

A scientific man ought to have no wishes, no affections, - a mere heart of stone.

Until we're educating every kid in a fantastic way, until every inner city is cleaned up, there is no shortage of things to do.

Deep in the human unconscious is a pervasive need for a logical universe that makes sense. But the real universe is always one step beyond logic.

The future belongs to those who believe in the beauty of their dreams.

The keenest sorrow is to recognize ourselves as the sole cause of all our adversities.

Courage is grace under pressure.

The Declaration of Independence I always considered as a theatrical show. Jefferson ran away with all the stage effect of that... and all the glory of it.

Anxiety is the dizziness of freedom.

One of the great penalties those of us who live our lives in full view of the public must pay is the loss of that most cherished birthright of man's, privacy.

The dogmas of the quiet past are inadequate to the stormy present. The occasion is piled high with difficulty, and we must rise with the occasion. As our case is new, so we must think anew and act anew.

A man can do what he wants, but not want what he wants.

You will always be fond of me. I represent to you all the sins you never had the courage to commit.

There is the view that poetry should improve your life. I think people confuse it with the Salvation Army.

Go on, get out. Last words are for fools who haven't said enough.

There's real poetry in the real world. Science is the poetry of reality

Never accept a drink from a urologist.

A place for everything, and everything in its place.

To hell with circumstances; I create opportunities.

Jests that give pains are not jests.