Who said "You have to commit completely to what you're doing."?

This quote is attributed to Robert De Niro.

You have to commit completely to what you're doing. - Robert De Niro

"You have to commit completely to what you're doing."

Robert De Niro Motivation

Actor American Born 1943 (age 83)

"You work hard and you want to be rewarded for it."

"The hardest thing about being an actor is being unemployed."

"I like to play characters that are different from me."

"You've got to understand, acting is not about being famous."

"I believe in working hard for what you want."

"Never underestimate the power of determination."

"I don't need a reason to fight."

"The most important thing is the mission. Nothing else matters."