Who said "There's no substitute for hard work and persistence."?

This quote is attributed to Jay Leno.

There's no substitute for hard work and persistence. - Jay Leno

"There's no substitute for hard work and persistence."

Jay Leno Perseverance

Stand-up Comedian American Born 1950 (age 76)

"I don't think anything is unrealistic if you believe you can do it."

"People don't want to go to the trouble of voting for me."

"Honestly, I don't know what makes a divorce more or less permanent."

"The only thing that gets me is unfairness."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."