He who would accomplish little must sacrifice little; he who would achieve much must sacrifice much; he who would attain highly must sacrifice greatly.
The good times of today are the sad thoughts of tomorrow.
In the United States today, we have more than our share of the nattering nabobs of negativism.
A man of honour should never forget what he is because he sees what others are.
Christmas to a child is the first terrible proof that to travel hopefully is better than to arrive.
A scientific man ought to have no wishes, no affections, - a mere heart of stone.
Don't tell me the moon is shining; show me the glint of light on broken glass.
Memory... is an internal rumour.
After all, science is essentially international, and it is only through lack of the historical sense that national qualities have been attributed to it.
We do not have to visit a madhouse to find disordered minds; our planet is the mental institution of the universe.
He who never made a mistake, never made a discovery.
Your personal nature seeks its paradise.
The cloud is free only to go with the wind. The rain is free only in falling.
The fascination of shooting as a sport depends almost wholly on whether you are at the right or wrong end of the gun.
It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.
At the heart of all beauty lies something inhuman.
A hero cannot be a hero unless in a heroic world.
It ain't over 'til it's over.
There are no facts, only interpretations.
If everything isn't black and white, I say, 'Why the hell not?'
Computers are useless. They can only give you answers.
