Two twists on the classic "teach a man to fish" proverb.
Give a man a fish, you feed him for a day.
Teach a man to fish, and he'll take your boat and sit out in the middle of the lake all day and drink all your beer.

Or the Dilbert version:

Give a man a fish, you feed him for a day.
Teach a man to fish, and he'll wear an ugly hat.
Talk to a hungry man about fish, and you're a consultant.