Accept what you are able to do and what you are not able to do. Accept the past as past, without denying it or discarding it. Learn to forgive yourself and to forgive others. Don't assume that it's too late to get involved.

Tuesdays With Morrie: An old man, a young man, and life's greatest lesson (ed. Hachette UK, 2009) - ISBN: 9780748112616