Albert Einstein

"If we knew what it was we were doing, it would not be called research, would it?"

"The world is a dangerous place to live, not because of the people who are evil, but because of the people who don't do anything about it."

"One thing I have learned in a long life: that all our science, measured against reality, is primitive and childlike -- and yet it is the most precious thing we have."

"My religion consists of a humble admiration of the illimitable superior spirit who reveals himself in the slight details we are able to perceive with our frail and feeble mind."

"Imagination is the highest form of research."

"The most beautiful thing we can experience is the mysterious. It is the source of all true art and all 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."

"Life is like riding a bicycle. To keep your balance, you must keep moving."

"Everything is determined, the beginning as well as the end, by forces over which we have no control. It is determined for the insect, as well as for the star. Human beings, vegetables, or cosmic dust, we all dance to a mysterious tune, intoned in the distance by an invisible piper."

"The most beautiful thing we can experience is the mysterious. It is the source of all true art and all 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."

"If the facts don't fit the theory, change the facts."

"Strange is our situation here on Earth. Each of us comes for a short visit, not knowing why, yet sometimes seeming to divine a purpose. From the standpoint of daily life, however, there is one thing we do know: that man is here for the sake of other men - above all for those upon whose smiles and well-being our own happiness depends."

"No, this trick won't work... How on earth are you ever going to explain in terms of chemistry and physics so important a biological phenomenon as first love?"

"A clever person solves a problem. A wise person avoids it."

"We know from daily life that we exist for other people first of all, for whose smiles and well-being our own happiness depends."

"Love is a better teacher than duty."

"If at first the idea is not absurd, then there is no hope for it."

"Science without religion is lame, religion without science is blind."

"Great spirits have always encountered opposition from mediocre minds. The mediocre mind is incapable of understanding the man who refuses to bow blindly to conventional prejudices and chooses instead to express his opinions courageously and honestly."

"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

"If a cluttered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign?"