From the commentary to game 69 in My Best Games by Victor Korchnoi (2011 edition):
I was always on excellent terms with David Bronstein…But as regards our individual meetings at the chess board, here he performed like a strict teacher. He liked to show and to demonstrate to me, that my understanding of chess was primitive and static, and that I underestimated the dynamics of the game…But in order to enjoy success at the chess board, an understanding of the game alone is not enough. You must have health, energy, and a balanced nervous system, in order to be confident, but at the same time to maintain your objectivity about what is happening on the board.
