"He that always gives way to others will end in having no principles of his own."
-Aesop
"I argue very well. Ask any of my remaining friends. I can win an argument on any topic, against any opponent. People know this, and steer clear of me at parties. Often, as a sign of their great respect, they don't even invite me."
-Dave Barry
"Silence is one of the hardest arguments to refute."
-Josh Billings
"People generally quarrel because they cannot argue."
-Gilbert K. Chesterton
"The sounder your argument, the more satisfaction you get out of it."
-Edward W. Howe
"The fellow that agrees with everything you say is either a fool or he is getting ready to skin you."
-Kin Hubbard
"It is better to debate a question without settling it than to settle a question without debating it."
-Jeseph Joubert
"I have never in my life learned anything from any man who agreed with me."
-Dudley Field Malone
"He who establishes his argument by noise and command shows that his reason is weak."
-Michel de Montaigne
"There is no conversation more boring than the one where everybody agrees."
-Michel de Montaigne
"You have not converted a man because you have silenced him."
-John Morley
"A man never tells you anything until you contradict him."
-George Bernard Shaw