Dr. Emmett Brown

"Courage is doing what's right despite fear."

"Happiness is found in meaningful pursuits."

"Life is a precious gift to be cherished."

"The family bond is unbreakable."

"True friendship is rare and invaluable."

"Wisdom comes from experience and reflection."

"This is heavy."

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

"Great Scott!"

"The way I see it, if you're gonna construct a time machine into a car, why not do it with some style?"

"Roads? Where we're going, we don't need roads."

"I'm conducting an experiment to see if my hypothesis about temporal displacement has any validity."

"The future hasn't been written yet. No one's has. Your future is whatever you make it."

"This is it. This is the temporal displacement that occurs in the flux capacitor."

"Marty, you've got to understand that if my calculations are correct, and they always are, we'll arrive at precisely 10:04 p.m."

"One point twenty-one gigawatts!"

"I'm sorry, but you're my density. I mean, my destiny."

"Without courage, how can we accomplish anything?"

"The consequences of this particular invasion of the space-time continuum could be devastating."

"We're heading for that telephone pole!"

"Marty, I don't think you fully appreciate the magnitude of this."

"It's all a matter of time, really."

"The consequences of this temporal experiment could be catastrophic."

"All we need is a little plutonium, and we can be on our way."

"I'm afraid you're stuck here, Marty. We have no way to generate the 1.21 gigawatts we need."

"Only science can save us now."

"Marty, this is the one part of the past that bothers me. If we tamper with it, we could alter the present."

"The flux capacitor! It's what makes time travel possible."

"When this baby hits 88 miles per hour, you're gonna see some serious shit."

"I've spent the last thirty years preparing for this moment."