From Conquest of the Planet of the Apes
The King is dead. Long live the King! Tell me Breck, before you die - how do we differ from the dogs and cats that you and your kind used to love? Why did you turn us from pets into slaves?
Because your kind were once our ancestors. Because man was born of apes, and there's still an ape curled up inside of every man. You're the beast in us that we have to whip into submission. You're the savage that we need to shackle in chains. You taint us, Caesar. You poison our guts. When we hate you, we're hating the dark side of ourselves.