We may think this after a meditation, a meeting, when our kids pass milestones, or when a loved one dies. When we are in the autumn of our own lives. Endings remind us of the sacredness of what came before. Maybe we should have been more present, but regret takes us out of the present moment too.
If we are aware enough, we realize we are never aware enough. Wiser to forgive ourselves for this basic human condition, and reflect on what has passed with gratefulness.