Injustice by omission. One line widens the very notion of ἀδικία: the unjust is not only the one who acts (ὁ ποιῶν) but often the one who does not act (ὁ μὴ ποιῶν). For the Stoics justice is not reducible to the prohibition "do no harm" — it includes the positive duty of help: rational beings are "born for one another… to help according to desert" (9.1), and to withhold the aid one owed is as much a breach as active injury. The sin of omission is a sin in full.

The discipline of action — from both sides. The maxim closes the circuit of DOGMAsociability: if my nature is to be a "limb" (μέλος) of a common body, then inaction where the body awaits my work cuts me off from the whole no less than an anti-social act (cf. 8.34; 05-01 — rise and do "the human thing"; 12.17 — "not to do what one should not; not to speak falsely" and to do what one should). The governing discipline is action.