What you concentrate on, is accentuated by the expense of something else

Concentration is the nature of the will to power, and it is the thinking, which concentrates itself.

Something is accentuated by the mind, is being brought in focus, something else is excluded, steps in the background.

Concentration is a choice.

What you concentrate on, is accentuated by the expense of something else.

It is a kind of isolation and exclusiveness, reserve.