“The true sign of intelligence is not knowledge but imagination.”

“As our circle of knowledge expands, so does the circumference of darkness surrounding it.”

“Out yonder there is this huge world, which exists independently of us human beings and which stands before us like a great, eternal riddle, at least partially accessible to our inspection and thinking”

“Still there are moments when one feels free from one’s own identification with human limitations and inadequacies. At such moments, one imagines that one stands on some spot of a small planet, gazing in amazement at the cold yet profoundly moving beauty of the eternal, the unfathomable: life and death flow into one, and there is neither evolution nor destiny; only being.”

“How vile and despicable war seems to me! I would rather be hacked to pieces than take part in such an abominable business.”

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

“Ethical axioms are found and tested not very differently from the axioms of science. Truth is what stands the test of experience.”

“What a sad era when it is easier to smash an atom than a prejudice.”

“Tình cảnh của những đứa con trái đất chúng ta mới kỳ lạ làm sao! Mỗi chúng ta đến đây như một chuyến viếng thăm ngắn ngủi. Ta không biết để làm gì, nhưng đôi khi ta tin rằng ta cảm nhận được điều đó. Song, nhìn từ cuộc sống thường nhật mà không đi sâu hơn, ta biết rằng: ta đến đây vì người khác - trước hết vì những người mà hạnh phúc của riêng ta phụ thuộc hoàn toàn vào nụ cười và sự yên ấm của họ, kế đến là vì bao người không quen mà số phận của họ nối với ta bằng sợi dây của lòng cảm thông.”

“E=mc2”

“Belajarlah dari masa lalu, hiduplah untuk masa depan. Yang terpenting adalah tidak berhenti bertanya.”

“Before God we are all equally wise - and equally foolish.”

“The best way to cheer yourself is to cheer somebody else up.”

“A knowledge of the existence of something we cannot penetrate, of the manifestations of the profoundest reason and the most radiant beauty - it is this knowledge and this emotion that constitute the truly religious attitude; in this sense, and in this alone, I am a deeply religious man.”

“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.”