He could gamble with his own suffering

Paraphrased from Elie Wiesel's THE OATH, an old man describes one of the characters:

He could gamble with his own suffering, but not with that of someone for whom suffering was not a game. He knew that nothing justifies the pain one person causes another. Any messiah in whose name people are tortured can only be a false messiah. It is by diminishing evil, present and real evil, experienced evil, that one builds the city of the sun. It is by helping those persons who look at you with tears in their eyes, needing help, needing you or at least your presence, that you may reach wholeness.