Who said "I believe in you, Marty. That should be enough."?

This quote is attributed to Doc Brown.

I believe in you, Marty. That should be enough. - Doc Brown

"I believe in you, Marty. That should be enough."

Doc Brown Faith

"This is heavy."

"There's that word again, 'heavy.' Is there something wrong with the Earth's gravitational pull in the future?"

"Great Scott!"

"If my calculations are correct, when this baby hits eighty-eight miles per hour, you're gonna see some serious shit."

"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"