Doc Brown

"I believe in the power of second chances."

"The past teaches us, but it doesn't define us."

"I've devoted my life to pushing the boundaries of what's possible."

"Great achievements require great sacrifice."

"I measure my life by the questions I've answered, not the answers I've found."

"Time is a gift. Use it wisely."

"The greatest inventions come from necessity."

"I believe that tomorrow can always be better than today."

"Knowledge without wisdom is dangerous."

"I've learned that connections between people are what matter most."

"The pursuit of truth is the noblest endeavor."

"I've always believed that the impossible just takes a little longer."

"This is heavy."

"Great Scott!"

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

"1.21 gigawatts! 1.21 gigawatts! Great Scott!"

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

"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 your density. I mean, your destiny."

"This is the future. Anything is possible."

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

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

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

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

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

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

"Science rules!"

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

"Every moment in time is critical."