Kasparov quote reference Kasparov apparently said: 


  By strictly observing Botvinnik's rule regarding the thorough analysis
  of one's own games, with the years I have come to realize that this
  provides the foundation for the continuous development of chess
  mastery.


Does anyone know what this rule is precisely that Kasparov refers to and/or in what source Botvinnik stated the rule?
I think in Yermolinski's "The Road to Chess Improvement" he says that he decided to follow "the most common advice one can find in the works of Alekhine and Botvinnik , which can be put into simple words - study your games". Of course Yermolinski takes it much further saying that "study your games" means to do a thorough analysis of each of your games even going as far as to write full annotations for them.

The closest I find in Botvinnik quotes is:


  I claim that nothing else is so effective in encouraging the growth of
  chess strength as such independent analysis, both of the games of the
  great players and your own


This can be found in several quote sites - http://chess-quotes.blogspot.co.uk/2014/07/botvinnik.html is one such example.