Friedrich Nietzsche

Daybreak

Book V

500 Against the grain– A thinker can for years on end force himself to think against the grain: that is to say, to pursue not the thoughts which offer themselves from within him but those to which an office, a prescribed schedule, an arbitrary kind of industriousness seem to oblige him. In the end, however, he will fall sick: for this apparently moral overcoming of himself will ruin his nervous energy just as thoroughly as any regularly indulged in excess could do.