As a rule, so-called "positional" sacrifices are considered more difficult, and therefore more praise-worthy, than those which are based exclusively on an exact calculation of tactical possibilities.

A lifetime in not enough to learn everything about chess.

The retreat of a minor piece to the back rank, where it cuts the lines of communication between the rooks, is permissable only in exceptional cases.

I consider chess an art, and accept all those responsibilities which art places upon its devotees.

Chess for me is not a game, but an art. Yes, and I take upon myself all those responsibilities which an art imposes on its adherents.

Deux fous gagnent toujours, mais trois fous, non!

Chess is a matter of vanity.