Always listen to the experts. They’ll tell you what can’t be done and why. Then do it.

—Robert Heinlein

I always advise people never to give advice.

—P.G. Wodehouse

No enemy is worse than bad advice.                              —Sophocles

There is nothing which we receive with so much reluctance as advice.

—Joseph Addison

The true secret of giving advice is, after you have honestly given it, to be perfectly indifferent whether it is taken or not, and never persist in trying to set people right.

—Hannah Whitall Smith

A word to the wise ain’t necessary — it’s the stupid ones who need the advice.

—Bill Cosby

People are always willing to follow advice when it accords with their own wishes.

—Lady Blessington

Accept good advice gracefully —as long as it doesn’t interfere with what you intended to do in the first place.

—Gene Brown

Advice is judged by results, not by intention.                    —Cicero

Good advice is often annoying — bad advice never is.

—French proverb

If you can distinguish between good advice and bad advice, then you don’t need advice.

—Van Roy’s Second Law

I cannot give any scientist of any age better advice than this: the intensity of a conviction that a hypothesis is true has no bearing over whether it is true or not.

—Peter Medawar

I realize that advice is worth what it costs — that is, nothing.

—Douglas MacArthur