"The chess pieces are the block alphabet which shapes thoughts; and these thoughts, although making a visual design on the chess-board, express their beauty abstractly, like a poem. ... I have come to the personal conclusion that while all artists are not chess players, all chess players are artists." - Marcel Duchamp (There has been debate about the translation)
"He who analyzes blitz games is stupid." - Nezhmetdinov (cited by Kramnik in "My Life and Games" according to Soltis in "The Wisest Things Ever Said about Chess")
"That rakia from cow dung you are drinking apparently has bad side effects." - IM pfren
"These Hypermodern players who object to 1.e4 will play about 20 moves in which nothing happens; then the annotator will declare with a flourish, 'and now White threatens e4!'"
Emanuel Lasker