“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.”*
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*Frankl, Viktor E.. Man's Search for Meaning (pp. 133-134). Beacon Press. Kindle Edition. (Bold emphasis added.)
Viktor Emil Frankl (26 March 1905 – 2 September 1997)[1] was an Austrian neurologist, psychiatrist, philosopher, author, and Holocaust survivor.[2]
He was the founder of logotherapy, a school of psychotherapy which describes a search for a life meaning as the central human motivational force.[3] Logotherapy is part of existential and humanistic psychology theories.[4]
Logotherapy was recognized as the third school of Viennese Psychotherapy; the first school was created by Sigmund Freud, and the second by Alfred Adler.
Frankl published 39 books.[5] The autobiographical Man's Search for Meaning, a best-selling book, is based on his experiences in various Nazi concentration camps.[6]
https://en.wikipedia.org/wiki/Viktor_Frankl