In trying to be clever, the Earl of Rochester once left a message on King Charles II's bedchamber door. It read:
"Here is our sovereign lord the king,
Whose promise noone relies on;
He never said a foolish thing,
Nor ever did a wise one."

Not to be outdone, Charles replied with the following:
"This is very true, for my words are my own, and my actions are those of my ministers."