Forgive Yourself for Not Being Present

How do i truly forgive myself for not being present with another? Well, i assume the question refers to something that happened in the past. Some parents have that feeling also, because when they look back upon how they brought up their children, they cannot believe how unconscious they were as parents. No matter what you do, there's always something that you don't do right. Absolute perfection is just not possible. There are now, for the first time, perhaps in history, there are parents who are relatively conscious and endeavouring to be conscious as parents. In my generation, it was unheard of conscious parents. What's that nonsense? You justi the parents brought you up in the same way