you must study the endgame before everything else. - José Raúl Capablanca

One must attempt to increase whatever weakness there may be in the opponent’s position; or, if there is none, one or more must be created.

In order to improve your game, you must study the endgame before everything else, for whereas the endings can be studied and mastered by themselves, the middle game and the opening must be studied in relation to the endgame.

Morphy's principal strength does not rest upon his power of combination but in his position play and his general style....Beginning with la Bourdonnais to the present, and including Lasker, we find that the greatest stylist has been Morphy. Whence the reason, although it might not be the only one, why he is generally considered the greatest of all.