Back to the Future

"The past is fixed, but the future is in motion."

"You must approach this with your mind, not your emotions."

"Sometimes great change comes from small decisions."

"I didn't invent time travel for profit. I invented it to benefit mankind."

"Your future hasn't been written yet. No one's has."

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

"I've calculated every variable. This will work."

"We've got to work together. That's the only way."

"The only way to get him to go back in time is to appeal to his scientific curiosity."

"I'm running 1.21 gigawatts of power through this thing."

"All we need is a little faith and determination."

"Marty, you're my best friend. And I'm not going to let you down."

"The space-time continuum is your responsibility now."

"I'm a scientist. I deal in facts, not hypotheticals."

"Action is what matters. What we do."

"What really matters is that you're trying to be a better person."

"This is only a delay. We can overcome this."

"I think I'm beginning to understand dimensional physics."

"The consequences of this event could be disastrous."

"You've got to believe me. I know this sounds insane, but I'm from the future."

"This is the future. Things are different here."

"I've got to get you up to eighty-eight miles per hour."

"I'm sure that in 1985, plutonium is available at every corner drugstore, but in 1955, it's a little hard to come by."

"Listen, all I can tell you is that in the future, we don't make very good time machines."

"That's what I love about these high school chicks, man. I get older, they stay the same age."

"Einstein, he's one of you dodos. You realize what you've become? A couple of versions!"

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

"Jump in, kid! We gotta go back to the future!"

"I'm conducting an experiment to see if you will help me."

"Tell me, future boy, who's the president of the United States in 1985?"