Be deliberate! Marcus Aurelius 4.2

Marcus reiterates his commitment to having a plan, always.

Μηδὲν ἐνέργημα εἰκῇ μηδὲ ἄλλως ἢ κατὰ θεώρημα συμπληρωτικὸν τῆς τέχνης ἐνεργείσθω.

Never undertake any project at random, without a well-developed plan for its execution.