Those who make peaceful
change impossible
Make violent revolution inevitable.

-President John F. Kennedy

"They that can give up essential liberty to obtain a little temporary safety
deserve neither
liberty nor safety."

-Benjamin Franklin, 1759
  There is no lasting hope in violence, only temporary relief from hopelessness.
-Kingman Brewster Jr

"I and the people know
What all schoolchildren learn,
Those to whom evil is done,
Do Evil in return."
-W.H. Auden