What's that one about "best not to open your mouth and stick your foot in it, thus removing all doubt about how stupid you are.." Something along those lines...?
"We were given 2 ears and 1 mouth. We should listen twice as much as we talk!"
"It's easy to be generous with another man's money".....hmmmm, sounds like someone in Washington should hear this one!
"A person who gets all wrapped up in himself makes a mighty small package!" hmmmm, another one to send to Washington.
"If you can't advice, you can't be helped."
"A false friend and a shadow stay only while the sun shines."