What are some of the gifts of the "awful mercy" of God? Loss, disillusionment, failure and big mistakes. It may appear heartless to the many people I have harmed throughout my life but I would not dare to change a single thing. Saving someone from their pain might just be condemning them to never change in a way best for their soul. My understanding of what is of maximum usefulness for another's soul ultimate well-being, as well as that of my own, is hubris. There is necessary suffering, without which I may not come to know the greatest freedom and deepest joy possible in Christ. God wastes nothing for our redemption.
The regrets that would prompt such an adventure are, to me, nothing more than self-centeredness and selfishness. Love accepts life on life's terms, and that means mistakes big and small. It is both in humbly admitting my wrongs and giving another the opportunity to forgive that we grow together, expand the soul.