The main Objective of any operation in an open file is the eventual Occupation of the seventh or eighth Rank.
Aron NimzowitschIn the middlegame, the king is merely an extra, but in the endgame, he is one of the star actors.
Aron NimzowitschThe great mobility of the King forms one of the chief characteristics of all endgame strategy. In the middlegame the King is a mere 'super', in the endgame on the other hand - on of the 'principals'. We must therefore develop him, bring him nearer to the fighting line.
Aron NimzowitschWhen I today ask myself whence I got the moral courage, for it takes moral courage to make a move (or form a plan) running counter to all tradition, I think I may say in answer, that it was only my intense preoccupation with the problem of the blockade which helped me to do so.
Aron Nimzowitsch