“Man is not born to solve the problem of the universe, but to find out what he has to do; and to restrain himself within the limits of his comprehension.”

“A human being is not one thing among others; things determine each other, but man is ultimately self-determining. What he becomes--within the limits of endowment and environment--he has made out of himself.”

“Man is the only animal for whom his own existence is a problem which he has to solve.”

“There is no deception on the part of the woman, where a man bewilders himself: if he deludes his own wits, I can certainly acquit the women. Whatever man allows his mind to dwell upon the imprint his imagination has foolishly taken of women, is fanning the flames within himself -- and, since the woman knows nothing about it, she is not to blame. For if a man incites himself to drown, and will not restrain himself, it is not the water's fault.”

“A human being is not one thing among others; things determine each other, but man is ultimately self-determining. What he becomes - within the limits of endowment and environment- he has made out of himself. In the concentration camps, for example, in this living laboratory and on this testing ground, we watched and witnessed some of our comrades behave like swine while others behaved like saints. Man has both potentialities within himself; which one is actualized depends on decisions but not on conditions.”

“Man is a universe within himself.”