As a professor in two fields, neurology and psychiatry, I am...

As a professor in two fields, neurology and psychiatry, I am fully aware of the extent to which man is subject to biological, psychological and sociological conditions. But in addition to being a professor in two fields I am a survivor of four camps - concentration camps, that is - and as such I also bear witness to the unexpected extent to which man is capable of defying and braving even the worst conditions conceivable.