Quote by Benjamin Franklin

"There are three things extremely hard: steel, a diamond, and to know one's self."

Benjamin Franklin
Founding Father, Polymath American 1706–1790

More from Benjamin Franklin

"Tell me and I forget, teach me and I may remember, involve me and I learn."
"Either write something worth reading or do something worth writing."
"Well done is better than well said."
"Three may keep a secret, if two of them are dead."

All quotes by Benjamin Franklin