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.

I am fundamentally an optimist. Whether that comes from nature or nurture, I cannot say. Part of being optimistic is keeping one's head pointed toward the sun, one's feet moving forward. There were many dark moments when my faith in humanity was sorely tested, but I would not and could not give up to despair.
That way lay defeat and death.