“Never memorize something that you can look up.”

“As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.”

“Communities tend to be guided less than individuals by conscience and a sense of responsibility. How much misery does this fact cause mankind! It is the source of wars and every kind of oppression, which fill the earth with pain, sighs and bitterness.”

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

“Sans culture morale, aucune chance pour les hommes.”

“Look deep, deep into nature, and then you will understand everything better. -”

“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.”

“I don't pretend to understand the universe — it's much bigger than I am.”

“Curiosity is more important than knowledge.”

“Knowledge is limited. Imagination encircles the world.”

“Tanda kecerdasan sejati bukanlah pengetahuan tapi imajinasi.”

“All religions, arts and sciences are branches of the same tree. All these aspirations are directed toward ennobling man's life, lifting it from the sphere of mere physical existence and leading the individual towards freedom."

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

“Tidak ada yang lebih merusak martabat pemerintah dan hukum negeri dibanding meloloskan undang-undang yang tidak bisa ditegakkan.”

“Dunia ini berbahaya untuk dijadikan tempat tinggal.  Bukan karena orang yang berbuat jahat, melainkan karena orang yang duduk  dan membiarkannya terjadi”