To take revenge halfheartedly is to court disaster: Either condemn or crown your hatred.
Inigo Montoya: My name is Inigo Montoya. You killed my father. Prepare to die.
Revenge is a kind of wild justice, which the more a man’s nature runs to, the more ought law to weed it out.
Sean Archer: This is between you and me. Leave them out of it.
Castor Troy: No. Sean. “You” should have left them out of it. Your son was an accident. I wanted to kill you. But, you took it so personally. Why couldn’t you blame yourself or let it go?
Castor Troy: Why couldn’t you just kill yourself or let it go?
Sean Archer: No father could.
Castor Troy: No brother could either.
Tasha: Neither could a sister.
O dearly-bought revenge, yet glorious!
Dr Gaius Baltar: I’m going to call my lawyer. He’s the best in the business.
Caprica Six: That wouldn’t be necessary, because in a few hours, no one will be left to charge you with anything.
Baltar: What are you trying to say?
Caprica Six: Humanity’s children are returning home. Today.
Upon this, one has to remark that men ought either to be well treated or crushed, because they can avenge themselves of lighter injuries, of more serious ones they cannot; therefore the injury that is to be done to a man ought to be of such a kind that one does not stand in fear of revenge.