To my surprise I found that when other top players in the precomputer age (before 1995, roughly) wrote about games in magazines and newspaper columns, they often made more mistakes in their annotations than the players had made at the board.
Garry KasparovSetbacks and losses are both inevitable and essential if you're going to improve and become a good, even great, competitor. The art is in avoiding catastrophic losses in the key battles.
Garry KasparovI dropped the King's Indian in 1997 after one too many bad experiences against Kramnik.
Garry Kasparov