Good positions don't win games, good moves do.[Gerald ABRAHAMS]I've wasted a Black.[ABRAHAMS, after drawing a game with the Black pieces]You can retreat pieces... but not pawns. So always think twice about pawn moves.[Michael STEAN, in Simple Chess]Open files can be used by both players. The chess player, not being an unselfish advocate of equal opportunity, naturally prefers a one-way system.[Michael STEAN, in Simple Chess, on half-open files]
"no one ever won a game by resigning"(Unfortunately origin unknown)
"A good sacrifice is one that is not necessarily sound but leaves your opponent dazed and confused"