it is never too late to mend
There is always the opportunity to reconcile after a conflict. I know you haven't talked to Carly in years, but it is never too late to mend—why don't you try calling her?
It is never too late to mend.
Prov. It is never too late to apologize for something you have done or try to repair something you have done wrong. Sue: I still miss Tony, but it's been a year since our big fight and we haven't spoken to each other since. Mother: Well, it's never too late to mend; why don't you call him up and apologize?