Musonius Rufus on Learning from Anyone
"Ὅπου γὰρ ἄν τι καλὸν ᾖ, ἐκεῖ πρέπει μαθεῖν." — "Wherever there is something good, it is fitting to learn it." Musonius Rufus, exiled and hunted, expands the boundaries of the classroom.

Salvator Rosa — "Self-Portrait" (ca. 1647), public domain
Any teacher, any place.
Musonius Rufus, quoted in Stobaeus’ Florilegium III.29.83, says: «Ὅπου γὰρ ἄν τι καλὸν ᾖ, ἐκεῖ πρέπει μαθεῖν.» — "Wherever there is something good, it is fitting to learn it." For Musonius, wisdom wasn’t locked inside the Academy or Senate.
Philosophy has no walls.
Musonius believed the world is full of accidental teachers. He thought pride was the enemy of growth. Even a child, a slave, or a foreigner could teach you to live better—if you bothered to listen, and shelved your ego first.
Musonius didn’t care about social rank or school walls. If a slave or a stranger shows you wisdom, he says, take it in—humility is the price of learning.