Who said "Experience is the best teacher, but it's also the hardest."?

This quote is attributed to Lou Grant.

Experience is the best teacher, but it's also the hardest. - Lou Grant

"Experience is the best teacher, but it's also the hardest."

Lou Grant Knowledge

"You know, in this business, you have to have thick skin and a thicker wallet."

"I didn't get where I am by being nice to everybody."

"Life's too short to waste time on incompetence."

"A good editor doesn't just edit—he leads."

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."