Who said "You've got to believe you're somebody."?

This quote is attributed to Forrest Gump.

You've got to believe you're somebody. - Forrest Gump

"You've got to believe you're somebody."

Forrest Gump

"Life is like a box of chocolates, you never know what you're gonna get."

"My mama always said you've got to put the past behind ya before you can move on."

"I'm not a smart man, but I know what love is."

"Stupid is as stupid does."