We often hear the terms 'positional' and 'tactical' used as opposites. But this is as wrong as to consider a painting's composition unrelated to its subject. Just as there is no such thing as 'artistic' art, so there is no such thing as 'positional' chess.
Samuel ReshevskyTartakower once wrote that after planting a Knight in the center you can go to sleep. This is not to be taken literally, of course, but it contains more than a germ of truth.
Samuel ReshevskyGood players develop a tactical instinct, a sense of what is possible or likely and what is not worth calculating.
Samuel Reshevsky