Who said "I've got second chances now. I'm going to make them count."?

This quote is attributed to George McFly.

I've got second chances now. I'm going to make them count. - George McFly

"I've got second chances now. I'm going to make them count."

George McFly Hope

"I'm your density. I mean, your destiny."

"This is heavy."

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

"I'm not very good at science."

"Every day is a new opportunity."

"Hope is what gets us through difficult times."

"I'm not your enemy, kid. I'm trying to save you."

"Redemption is a long road."