If only the collective human race would abide by that philosophy.
EDIT: Got a new one myself, now. It's a quote from the 2002 iteration of The Time Machine, a film I first watched in English class when we were doing a unit on time travel in literature (just recently, I rented it to share it with the rest of the fam). Not bad, even if it deviates considerably from the book. As for the line itself, it's what the protagonist says near the film's climax... right before he kicks the uber-Morlock's albino butt.