From Meditations by Marcus Aurelius

All of us are working on the same project. Some consciously, with understanding; some without knowing it. (I think this is what Heraclitus meant when he said that “those who sleep are also hard at work” — they they too collaborate in what happens.) Some of us work in one way, and some in others. And those who complain and try to obstruct and thwart things — they help as much as anyone.

The world needs them as well.