“A horse was in sole occupation of a meadow. A stag having come and done much damage to the pasture, the horse, wishing to avenge himself on the stag, asked a man whether he could help him to punish the stag.
The man consented, on condition that the horse submitted to the bit and allowed him to mount him javelins in hand.
The horse agreed to the terms and the man mounted him, but instead of obtaining vengeance on the stag, the horse from that time became the man’s slave.
So then,” said he, “do you take care lest, in your desire to avenge yourselves on the enemy, you be treated like the horse.
You already have the bit, since you have chosen a dictator; if you give him a body-guard and allow him to mount you, you will at once be the slaves of Phalaris.”
 Aristotle. Rhetoric Book 2 Chapter 20 section 5 http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.01.0060:book=2:chapter=20&highlight=body%2Cguard