It has been observed many times throughout history that revolution tends to eat its young…

The scrupulous and the just, the noble, humane, and devoted natures; the unselfish and the intelligent may begin a movement – but it passes away from them. They are not the leaders of a revolution. They are its victims.
- Joseph Conrad

Revolution is engendered by an indignation with tyranny, yet is itself pregnant with tyranny.
- William Godwin

Revolution is like Saturn, it devours its own children.
- Georg Buchner