Who said "The most difficult thing is to know yourself."?

This quote is attributed to Thales of Miletus.

The most difficult thing is to know yourself. - Thales of Miletus

"The most difficult thing is to know yourself."

Thales of Miletus Education

Philosopher Ancient Greek 624–546

"Know thyself"

"Water is the principle of all things"

"The sun is new each day"

"All things are full of gods"

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."