"Literature preserves the wisdom of ages."
Literature
"The war against ignorance is never truly over."
War
"Inspiration strikes those who are open to possibility."
Inspiration
"Your potential is limitless if you choose to believe it."
Motivation
"This is heavy."
Wisdom
"Great Scott!"
"If my calculations are correct, when this baby hits 88 miles per hour, you're gonna see some serious shit."
Science
"The way I see it, if you're gonna build a time machine into a car, why not do it with some style?"
Creativity
"I'm your density. I mean, your destiny."
"Nobody calls me chicken!"
Courage
"Your future hasn't been written yet. No one's has. Your future is whatever you make it."
Hope
"Where we're going, we don't need roads."
Freedom
"1.21 gigawatts! 1.21 gigawatts! Great Scott!"
Technology
"The whole thing is insane! There's no way it should work!"
Imagination
"I've always said that if you put your mind to it, you can accomplish anything."
Success
"A man can change his destiny if he really wants to."
Change
"Science rules!"
Science
"This is it! This is the answer! It says here that a bolt of lightning is going to strike the clock tower at precisely 10:04 PM next Saturday night."
Knowledge
"The proper utilization of the scientific method would suggest that we must conduct experiments."
Education
"I'm not afraid of the future anymore. I'm going to go out there and make my own destiny."
Courage
"There's that word again. Heavy. Is there something wrong with the Earth's gravitational pull in the future?"
Humor
"You see, Einstein has just theoretical physics. I've built a time machine!"
"Whatever happened, happened. We can't change the past."
"I find that if you apply yourself, there's no limit to what you can accomplish."
Perseverance
"The space-time continuum is not something to be taken lightly."
"Marty, you've got to understand that if you put your mind to it, you can accomplish anything."
Motivation
"Temporal mechanics suggests that time is not a straight line but rather a series of possibilities."
Philosophy
"In the future, we'll solve all the world's problems through science and reason."
Hope
"A scientist must be willing to challenge conventional wisdom."
Courage
"The flux capacitor is the key to everything."
Knowledge