"Listen often, respond seldom, and analyze everything. They who ramble on with inflammatory comments in order to insult, anger, or annoy opponents are nothing more than self-absorbed fools. Remain silent, let the fools talk, you will learn more about them than you ever thought possible." Reflections on the ass-hats of Eve

Urban Dictionary: ass-hat
One whose head is so far up their rear end it could pass for a hat; used to describe a person who is stubborn, cruel, or otherwise unpleasant to be around. Someone so incredibly stupid and/or ignorant that everything above their waist is useless.

“It's amazing what you'll learn when a person is trying to convince himself out loud” Author unknown

"Never argue with a fool, onlookers may not be able to tell the difference." attributed to Mark Twain