Make No Peace With Evil.
“The only thing necessary for the triumph of evil is for good men to do nothing.” ― Edmund Burke
“Never open the door to a lesser evil, for other and greater ones invariably slink in after it.” ― Baltasar Gracian
“It is very hard for evil to take hold of the unconsenting soul.” ― Ursula K. Le Guin
“Tolerance becomes a crime when applied to evil.” ― Thomas Mann
“Unless a man becomes the enemy of an evil, he will not even become its slave but rather its champion.” ― G.K. Chesterton
“The spread of evil is the symptom of a vacuum. Whenever evil wins, it is only by default: by the moral failure of those who evade the fact that there can be no compromise on basic principles.” ― Ayn Rand
“They accept evil not because they say yes, but because they don't say no” ― Terry Pratchett
“Do not imagine that the good you intend will balance the evil you perform.” ― Norman Mac Donald