Sailors cursing the helmsman? He keeps steering.

The source

"Sailors cursing the helmsman? He keeps steering." Marcus Aurelius said it in Meditations 6.55. Translated from the original Greek by Spartan Surfers.

"Εἰ κυβερνῶντα οἱ ναῦται ἢ ἰατρεύοντα οἱ κάμνοντες κακῶς ἔλεγον, ἄλλῳ τινὶ ἂν προσεῖχον ἢ πῶς αὐτὸς ἐνεργοίην τὸ τοῖς ἐμπλέουσι σωτήριον"

Original Greek, Meditations 6.55. Greek: Leopold 1908 (Teubner) via Perseus.

Who said it

Marcus Aurelius (121–180 AD). Roman emperor who wrote private notes to himself on a military campaign. We know them as the Meditations.

Questions

Who said "Sailors cursing the helmsman? He keeps steering."?

Marcus Aurelius (121–180 AD). Source: Meditations 6.55.

What is the original Greek?

Εἰ κυβερνῶντα οἱ ναῦται ἢ ἰατρεύοντα οἱ κάμνοντες κακῶς ἔλεγον, ἄλλῳ τινὶ ἂν προσεῖχον ἢ πῶς αὐτὸς ἐνεργοίην τὸ τοῖς ἐμπλέουσι σωτήριον. Translated from the original Greek by Spartan Surfers.