EVIL

"Tolerance becomes a crime when applied to evil." 
Thomas Mann (1875-1955)

"The world is a dangerous place to live, not because of the people who are evil, but because of the people who don't do anything about it."
Albert Einstein (1879-1955)

“Silence in the face of evil is itself evil: God will not hold us guiltless. Not to speak is to speak. Not to act is to act.”
Dietrich Bonhoeffer (1906-1945)

"He who passively accepts evil is as much involved in it as he who helps to perpetrate it. He who accepts evil without protesting against it is really cooperating with it."
Martin Luther King (1929-1968)

Auferte malum ex vobis.
(Remove the wicked from among you.)