Chess is a scientific game and its literature ought to be placed on the basis of the strictest truthfulness, which is the foundation of all scientific research.
W. Steinitz
Drawing general conclusions about your main weaknesses can provide a great stimulus to further growth.
Alexander Kotov
A good sacrifice is one that is not necessarily sound but leaves your opponent dazed and confused.
Rudolf Spielmann
Kasparov’s book are the best, as far as high level analyses are concerned.
Jan Timman 1991 NIC
Botvinnik and Tal are among the best; I also like Spassky, but I think Petrosian is better than all of them. His weakness is too many draws, even against players he could beat easily. Maybe he lacks self-confidence.
Robert Fischer 1960