In talking on a few occasions with my Grandma Iva, she recalled her dad Archibald Hunter saying, “Let sleeping dogs lie.”
He was a simple man. He didn’t coin the phrase, he just liked to use it. To him it meant not bringing up things that would cause more issues. If something bad happened, leave it in the past. Don’t continue to bring it up. Just let the issue sleep.
This is a older idea but takes a lot of patience and understanding. To someone on the outside they simply call it ‘having class.’