Sage advice on Back to the Future Day.

Back to the Future Part III (1990)

Jennifer Parker: Dr. Brown, I brought this note back from the future and - now it's erased.

Doc: Of course it's erased!

Jennifer Parker: But what does that mean?

Doc: It means your future hasn't been written yet. No one's has. Your future is whatever you make it. So make it a good one, both of you.