Don’t spend your time mopping and worrying about things you’ve done in the past that cannot be changed.
This is a classic English proverb that warns people not to worry or be upset about things that have already happened or things that cannot be undone.
If someone says to you, don’t cry over spilt milk, you are likely to be moping about, racking your brain for ways you could have changed the outcome of your past actions!
You can’t change the past. So get off your sorry ass and keep on truckin’ down the road of life!