Natural necessity. Marcus Aurelius 4.9

Marcus Aurelius is fond of the notion that all things have purpose. But he does not say that we must control or understand that purpose fully; our place is to sense it, and then to move with it, adapting the rhythm of our expression to fit within the great cosmic dance that demands it.

Ἠνάγκασται ἡ τοῦ συμφέροντος φύσις τοῦτο ποιεῖν.

The nature of what must be compelled itself to create this moment.