I am sorry I took the quote as printed. I looked it up and here is the MLKJr. Quote as he wrote it. I still agree with it.
RETURNING HATE FOR HATE MULTIPLIES HATE, ADDING DEEPER DARKNESS TO…[/h2]
Returning hate for hate multiplies hate, adding deeper darkness to a night already devoid of stars. Darkness cannot drive out darkness: only light can do that. Hate cannot drive out hate: only love can do that. Hate multiplies hate, violence multiplies violence, and toughness multiplies toughness in a descending spiral of destruction. So when Jesus says “Love your enemies,” he is setting forth a profound and ultimately inescapable admonition…. The chain reaction of evil — hate begetting hate, wars producing more wars — must be broken, or we shall be plunged into the dark abyss of annihilation.
Sourced, Strength to Love (1963)
Ch. 5 : Loving your enemies; this passage contains some phrases King later used in “Where Do We Go From Here?” (1967)