The most important tactic in an argument, next to being right, is to leave an escape hatch for your opponent, so that he can gracefully swing over to your side without an embarrassing loss of face.
Sydney J. Harris (1917-1986) Anglo-American columnist, journalist, author
Pieces of Eight (1982)
(Source)
Frequently misquoted: "The most important thing in an argument, next to being right, is to leave an escape hatch for your opponent, so that he can gracefully swing over to your side without too much apparent loss of face."