dont look back

Dont look back is an idiom often used as a fair warning to someone to not dwell on the past. It is often said to people who tend to dwell on things that have happened to them in recent years and cant seem to get over it. Dont look back is a way to warn people that if they spend all of their time regretting what they have done and dwelling on the past, they wont be able to look forward and enjoy the present or look to the future.