an enormous capacity for adjusting to trying circumstances

…I found solitary confinement the most forbidding aspect of prison life. There is no end and no beginning; there is only one’s own mind, which can begin to play tricks. Was that a dream or did it really happen? One begins to question everything. Did I make the right decision, was my sacrifice worth it? In solitary, there is no distraction from those haunting questions.


But the human body has an enormous capacity for adjusting to trying circumstances. I have found that one can bear the unbearable if one can keep one’s spirits strong even when one’s body is being tested. Strong convictions are the secret of surviving deprivation; your spirit can be full even when your stomach is empty.

 
Long Walk to Freedom: The Autobiography of Nelson Mandela. Back Bay Books. 1995. p. 416