There were always choices to make. Every day, every hour, offered the opportunity to make a decision which determined whether you would or would not submit to those powers which threatened to rob you of your very self, your inner freedom; which determined whether or not you would become the plaything of circumstance, renouncing freedom and dignity to become molded into the form of the typical inmate.
Seen from this point of view, the mental reactions of the inmates of a concentration camp must seem more to us than the mere expression of certain physical and sociological conditions. Even though conditions such as lack of sleep, insufficient food and various mental stresses may suggest that the inmates were bound to react in certain ways, in the final analysis it becomes clear that the sort of person the prisoner became was the result of an inner decision, and not the result of camp influences alone. Fundamentally, therefore, any man can, even under such circumstances, decide what shall become of him -- mentally and spiritually. He may retain his human dignity even in a concentration camp.
Dostoevski said once, "There is only one thing that I dread: not to be worthy of my sufferings." These words frequently came to my mind after I became acquainted with those marytrs whose behavior in the camp, whose suffering and death, bore witness to the fact that the last inner freedom cannot be lost. It can be said that they were worthy of their sufferings; the way they bore their suffering was a geniune inner achievement. It is this spiritual freedom -- which cannot be taken away -- that makes life meaningful and purposeful.
-- Victor Frankl, in "Man's Search For Meaning'
(he was a Holocaust survivor who has written more than 32 books and developed existential psychology and logotherapy)