"Why did we obey? The question hardly occurred to us. We had formed the habit of deferring to our parents and teachers…"

"The remembrance of forbidden fruit is the earliest thing in the memory of each of us, as it is in that of mankind."

"Je dirais qu'il faut agir en homme de pensée et penser en homme d'action."

"The eyes see only what the mind is prepared to comprehend."

"I cannot escape the objection that there is no state of mind, however simple, that does not change every moment."

"The present contains nothing more than the past, and what is found in the effect was already in the cause."

"All the living hold together, and all yield to the same tremendous push. The animal takes its stand on the plant, man…"

"The prestige of the Nobel Prize is due to many causes, but in particular to its twofold idealistic and international …"

"Intuition is a method of feeling one's way intellectually into the inner heart of a thing to locate what is unique an…"

"The spectacle of what religions have been in the past, of what certain religions still are to-day, is indeed humiliat…"