Anyone who has never made a mistake has never tried anything new.
One cannot simultaneously prevent and prepare for war.
The most beautiful thing we can experience is the mysterious - the fundamental emotion which stands at the cradle of true art and true science. He to whom this emotion is a stranger, who can no longer pause to wonder and stand rapt in awe, is as good as dead: his eyes are closed.
In the middle of difficulty lies opportunity.
Concern for man and his fate must always form the chief interest of all technical endeavors... Never forget this in the midst of your diagrams and equations.
Only those who attempt the absurd can achieve the impossible.
The world is a dangerous place. Not because of the people who are evil; but because of the people who don't do anything about it.
I have become rather like King Midas, except that everything turns not into gold but into a circus.
We still do not know one thousandth of one percent of what nature has revealed to us.
Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction.
Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
The grand aim of all science is to cover the greatest number of empirical facts by logical deduction from the smallest number of hypotheses or axioms.
Why does this magnificent applied science, which saves work and makes life easier, bring us little happiness? The simple answer runs: because we have not yet learned to make sensible use of it.
The pursuit of truth and beauty is a sphere of activity in which we are permitted to remain children all our lives.
More and more I come to value charity and love of one's fellow being above everything else... All our lauded technological progress--our very civilization--is like the axe in the hand of the pathological criminal.
He who can no longer pause to wonder and stand rapt in awe, is as good as dead; his eyes are closed.
That deep emotional conviction of the presence of a superior reasoning power, which is revealed in the incomprehensible universe, forms my idea of God.
The important thing is not to stop questioning. Curiosity has its own reason for existing. One cannot help but be in awe when he contemplates the mysteries of eternity, of life, of the marvelous structure of reality. It is enough if one tries merely to comprehend a little of this mystery every day. Never lose a holy curiosity.
Most people go on living their everyday life: half frightened, half indifferent, they behold the ghostly tragi-comedy that is being performed on the international stage before the eyes and ears of the world.