Wise men argue causes, and fools decide them.
- Anacharsis

A knock-down argument; 'tis but a word and a blow.
- Dryden, John

If you can't answer a man's arguments, all is not lost; you can still call him vile names.
- Hubbard, Elbert

It may happen sometimes that a long debate becomes the cause of a longer friendship. Commonly, those who dispute with one another at last agree.
- Pandita, Saskya

If thou continuest to take delight in idle argumentation thou mayest be qualified to combat with the sophists, but will never know how to live with men.
- Socrates