Who said "You have to believe in what you're doing, or it shows."?

This quote is attributed to Lou Grant.

You have to believe in what you're doing, or it shows. - Lou Grant

"You have to believe in what you're doing, or it shows."

Lou Grant Faith

"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."

"Faith guides me through difficult times."

"Faith is believing when you can't see."

"You have to believe in something, or you'll fall for anything."

"Faith in God and in each other is what sustains us"