Why do we universally admire and respect a Gandhi, Mandela, Mother Teresa, Lincoln, or any other leader or legend from history's pantheon? It is because they were guided by integrity-based practices. They stood for something. They didn't break with the values they believed in just because they faced struggle.
I was in Vienna in August 1968 for a meeting of the International Federation of Multiple Sclerosis Societies, of which I was co-founder, and we wanted a 20th country to join. They asked for a volunteer to go to Prague to get Czechoslovakia to do it, and my hand always goes up first.