“Let us not ponder upon the past. It will simply take us backwards.
Look to the future and start fresh.
Put all of your energy and thoughts into a brand new unblemished tomorrow.
It is of the essence.
Don't dream of something you have no idea about.
Don't drive in reverse.
The past is full of cobwebs and dust.
The future is new and clean.
Don't imagine that the past is better than where you are right now.
Renew.
Move forward.
If you are in a bad place, change it for the better, brighter and new you.
~~~~~~~~~~~~”
Related quotes

Don't Be Cruel, written by Otis Blackwell and Elvis Presley (1956)
Song lyrics

Variant: You build on failure. You use it as a stepping sone. Close the door on the past. You don't try to forget the mistakes, but you don't dwell on it. You don't let it have any of your energy, or any of your time, or any of your space.

Celebetty: Heath Ledger: The Patriot Interview http://www.beatboxbetty.com/celebetty/heathledger/heathledger.htm, about his role in The Patriot, published at BeatBoxBetty.com (2000).
Variant: I'm not good at future planning. I don't plan at all. I don't know what I'm doing tomorrow. I don't have a day planner and I don't have a diary. I completely live in the now, not in the past, not in the future.

The Camelot Project interview (1996)
Context: When the legend is retold, it mirrors the reality of the time, and one can learn from studying how various authors have attempted to retell the story. I don't think we have an obligation to change it radically. I think that if we ever move too far from the basic story, we would lose something very precious. I don't, for instance, approve of fantasy that attempts to go back and rewrite the Middle Ages until it conforms to political correctness in the twentieth century. That removes all the benefit from reading the story. If you don't understand other people in their time and why they did what they did, then you don't understand your own past. And when you lose your past, you lose some potential for your own future.

“If you want a future, darling,
Why don't you get a past?”
"Let's Misbehave"
Paris (1928)