The sun shines into sewers and stays clean.

The source

"The sun shines into sewers and stays clean." Diogenes said it in Diogenes Laertius 6.63. Translated from the original Greek by Spartan Surfers.

"καὶ γὰρ ὁ ἥλιος, ἔφη, εἰς τοὺς ἀποπάτους, ἀλλʼ οὐ μιαίνεται."

Original Greek, Diogenes Laertius 6.63. Greek: Hicks 1925 Loeb text via Perseus.

Who said it

Diogenes (c. 412–323 BC). The Cynic who lived in a jar in Athens and told Alexander the Great to get out of his sun.

Questions

Who said "The sun shines into sewers and stays clean."?

Diogenes (c. 412–323 BC). Source: Diogenes Laertius 6.63.

What is the original Greek?

καὶ γὰρ ὁ ἥλιος, ἔφη, εἰς τοὺς ἀποπάτους, ἀλλʼ οὐ μιαίνεται. Translated from the original Greek by Spartan Surfers.