Chess is no whit inferior to the violin, and we have a large number of professional violinists
Mikhail BotvinnikI ... have two vocations: chess and engineering. If I played chess only, I believe that my success would not have been significantly greater. I can play chess well only when I have fully convalesced from chess and when the 'hunger for chess' once more awakens within me.
Mikhail BotvinnikEvery great master will find it useful to have his own theory on the openings, which only he himself knows, a theory which is closely linked with plans for the middle game.
Mikhail BotvinnikYou have to accustom yourself to practical study at home, you have to devote time to studies, to the history of chess, the development of chess theory, of chess culture.
Mikhail Botvinnik