“There comes a time when the mind takes a higher plane of knowledge but can never prove how it got there.”

“Play is the highest form of research.”

“Wenn man zwei Stunden lang mit einem Mädchen zusammensitzt, meint man, es wäre eine Minute. Sitzt man jedoch eine Minute auf einem heißen Ofen, meint man, es wären zwei Stunden. Das ist Relativität.”

“When Albert Einstein was asked what he would really like to know about the Universe he replied,'is it friendly?”

“The tendencies we have mentioned are something new for America. They arose when, under the influence of the two World Wars and the consequent concentration of all forces on a military goal, a predominantly military mentality developed, which with the almost sudden victory became even more accentuated. The characteristic feature of this mentality is that people place the importance of what Bertrand Russell so tellingly terms “naked power” far above all other factors which affect the relations between peoples. The Germans, misled by Bismarck’s successes in particular, underwent just such a transformation of their mentality—in consequence of which they were entirely ruined in less than a hundred years. I must frankly confess that the foreign policy of the United States since the termination of hostilities has reminded me, sometimes irresistibly, of the attitude of Germany under Kaiser Wilhelm II, and I know that, independent of me, this analogy has most painfully occurred to others as well. It is characteristic of the military mentality that non-human factors (atom bombs, strategic bases, weapons of all sorts, the possession of raw materials, etc.) are held essential, while the human being, his desires and thoughts—in short, the psychological factors—are considered as unimportant and secondary. Herein lies a certain resemblance to Marxism, at least insofar as its theoretical side alone is kept in view. The individual is degraded to a mere instrument; he becomes “human materiel.” The normal ends of human aspiration vanish with such a viewpoint. Instead, the military mentality raises “naked power” as a goal in itself—one of the strangest illusions to which men can succumb.”

“Everything must be made as simple as possible. But not simpler.”

“Only one who devotes himself to a cause with his whole strength and soul can be a true master. For this reason mastery demands all of a person.”

“It seems to me that the idea of a personal God is an anthropological concept which I cannot take seriously. I also cannot imagine some will or goal outside the human sphere... Science has been charged with undermining morality, but the charge is unjust. A man's ethical behavior should be based effectually on sympathy, education, and social ties and needs; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death.”

“Knowledge of what is does not open the door directly to what should be.”

“I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

“Félek attól a naptól amikor a technológia fontosabb lesz,mint a személyes kapcsolattartás.A világon lesz egy generációnyi idióta.”

“Tidak ada eksperimen yang bisa membuktikn aku benar, namun sebaliknya sebuah eksperimen saja bisa membuktikan aku salah.”

“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.”

“Be a loner. That gives you time to wonder, to search for the truth. Have holy curiosity. Make your life worth living.” 

“If I were to remain silent, I'd be guilty of complicity.”