Musonius Rufus on Courage and Action
"All men are afraid of the same things — but the brave act despite the fear." Musonius Rufus hammers this into his students, in hard Greek: «οὐδείς ἀνδρῶν οὐδὲν φοβεῖται ὧν οἱ ἄλλοι φοβοῦνται· ἀλλ' οἱ ἀγαθοὶ τολμῶσιν ἔργῳ.»

Unknown — "Hercules" (c. 30 BCE–20 CE), CC0
Courage, straight from the exile.
Musonius Rufus, recorded by Stobaeus, is blunt: «οὐδείς ἀνδρῶν οὐδὲν φοβεῖται ὧν οἱ ἄλλοι φοβοῦνται· ἀλλ' οἱ ἀγαθοὶ τολμῶσιν ἔργῳ.» — "All men are afraid of the same things, but the brave act despite the fear." No excuses, no applause. Just the hard truth laid bare in Greek.
Musonius’s lesson: fear is universal.
He watched emperors, senators, and slaves quake at the same shadows. What separated the brave was not fearlessness, but action in spite of it. Musonius demanded proof — not words, but deeds.
Musonius didn’t want heroes who pretended not to feel fear. He wanted action — because courage is what you do, not what you feel. The rest is theater.