“Combinatory play seems to be the essential feature in productive thought.”

“The perfection of means and the confusion of ends seems to be our problem.”

“Compound interest is the eighth wonder of the world. He who understands it, earns it ... he who doesn't ... pays it.”

“Although I have been prevented by outward circumstances from observing a strictly vegetarian diet, I have long been an adherent to the cause in principle. Besides agreeing with the aims of vegetarianism for aesthetic and moral reasons, it is my view that a vegetarian manner of living by its purely physical effect on the human temperament would most beneficially influence the lot of mankind.”

“If tomorrow were never to come, it would not be worth living today.”

“I am not a genius, I am just curious. I ask many questions. and when the answer is simple, then God is answering.”

“Truth is what stands the test of experience. ”

“Weakness of attitude becomes weakness of character.”

“To invent something, all you need is imagination and a big pile of junk.”

“Kebanyakan orang mengatakan bahwa kecerdasanlah yang melahirkan seorang ilmuwan besar. Mereka salah, karakterlah yang melahirkannya.”

“Come si può mettere la Nona di Beethoven in un diagramma cartesiano? Ci sono delle realtà che non sono quantificabili. L'universo non è i miei numeri: è pervaso tutto dal mistero. Chi non ha il senso del mistero è un uomo mezzo morto.”

“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.”

“Science can only ascertain what is, but not what should be, and outside of its domain value, elly judgments of all kinds remain necessary.”

“It is clear that all the valuable things, material, spiritual, and moral, which we receive from society can be traced back through countless generations to certain creative individuals. The use of fire, the cultivation of edible plants, the steam engine—each was discovered by one man.”

“The important thing is never to stop questioning.”