You're a religious man. You believe in God and life after death. I also believe. When we come to the other world and meet the millions of Jews who died in the camps and they ask us, 'What have you done?' there will be many answers. You will say, 'I became a jeweler.' Another will say, 'I smuggled coffee and American cigarettes.' Still another will say, 'I built houses,' but I will say, 'I didn't forget you.'
Although this maxim is associated with Wiesenthal (e.g. "Honoring Simon Wiesenthal", Congressional Record—House, Vol. 151, Pt. 15, 21 September 2005, p. 20804), he did not originate the quote, which appears in the context of the labor movement in the 19th century (e.g. Alexander Spencer, "Maintain Your Union", The Typographical Journal, Vol. 10, No. 7, 1 April 1897, p. 266).