In the movie Forrest Gump, does Forrest say 'Life is like a box of chocolate', or 'Life was like a box of chocolates'?

FORREST:
I could eat about a million and a
half of these. My momma always said,
"Life was like a box of chocolates.
You never know what you're gonna
get."

MRS. GUMP:
You're gonna have to figure that out
for yourself. Life is a box of
chocolates, Forrest. You never know
what you're gonna get.