
“A wrongdoer is often a man who has left something undone, not always one who has done something.”
Ἀδικεῖ πολλάκις ὁ μὴ ποιῶν τι, οὐ μόνον ὁ ποιῶν τι.
IX, 5
Source: Meditations (c. 121–180 AD), Book IX