Back to the Future

"Your son turned out to be quite a character."

"History is not a fixed point. It's a river, constantly changing."

"The question is not whether we can, but whether we should."

"Marty, you're my best friend, and I can't lose you."

"I didn't invent time travel. I improved it."

"The outcome of this moment will affect the future."

"We're scientists, Marty. We don't concern ourselves with politics."

"Nothing is impossible if you put your mind to it."

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

"I must warn you, traveling through time is dangerous."

"The mind is a terrible thing to waste."

"This temporal displacement has created an incredible opportunity for us."

"All we need is a little plutonium."

"I've got to hand it to you, you're a pretty brave kid."

"A person is smart, but people are dumb."

"Every moment in time is critical."

"We need to talk about your future, Marty."

"Science rules!"

"The future isn't written yet. Nobody's is."

"Time is the one thing we can't make more of."

"If we succeed, we'll make history. If we fail, we'll destroy it."

"By inventing time travel, I've changed the course of human history!"

"The lightning! It's not just power, it's a window to the future!"

"You built a time machine out of a DeLorean?"

"This is the future. Anything is possible."

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

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

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

"If my calculations are correct, when this baby hits 88 miles per hour, you're gonna see some serious shit."

"1.21 gigawatts! 1.21 gigawatts! Great Scott!"