The devil could change. He was once an angel and may be evolving still.
If two wrongs don't make a right, try three.
The man who is always waving the flag usually waives what it stands for.
Work is accomplished by those employees who have not yet reached their level of incompetence.
A man doesn't know what he knows until he knows what he doesn't know.
You don't need to take a persons advice to make him feel good, just ask him for it.