“Si buscas resultados distintos, no hagas siempre lo mismo.”

“Whoever undertakes to set himself up as a judge of Truth and Knowledge is shpwrecked by the laughter of the gods.”

“It is a very grave mistake to think that the enjoyment of seeing and searching can be promoted by means of coercion and a sense of duty. To the contrary, I believe it would be possible to rob even a healthy beast of prey of its voraciousness, if it were possible, with the aid of a whip, to force the beast to devour continuously, even when not hungry.”

“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.”

“Play is the highest form of research.”

“It is the theory which decides what can be observed”

“Ne pokušavam zamisliti nekog osobnog Boga; dovoljno je stajati sa strahopoštovanjem pred ustrojstvom svijeta i iskusiti ga onoliko koliko su to naša nedostatna osjetila u stanju.”

“Small is the number of them that see with their own eyes and feel with their own hearts.”

“To stimulate creativity, one must develop the childlike inclination for play and the childlike desire for recognition”

“Bear in mind that the wonderful things you learn in your schools are the work of many generations. All this is put in your hands as your inheritance in order that you may receive it, honor it, add to it, and one day faithfully hand it on to your children.”

“That deep emotional conviction of the presence of a superior reasoning power, which is revealed in the incomprehensible universe, forms my idea of God.”

“A new idea comes suddenly and in a rather intuitive way, but intuition is nothing but the outcome of earlier intellectual experience.”

“I cannot conceive of a great scientist without this profound faith: Science without religion is lame, religion without science is blind.”

“If A is a success in life, then A equals x plus y plus z. Work is x; y is play; and z is keeping your mouth shut”

“The gift of fantasy has meant more to me than my talent for absorbing positive knowledge.”