We can never be perfect because the mistakes we make are what shapes us into learning and becoming better while moving on with our lives. The thing is, travelling to the past could be dangerous especially when it has to alter our minds as we won´t remember why we actually went back, but having our minds intact while we get the younger self back, that could help us. This is just impossible though.
RE: The Quest for Perfection: Revisiting the Past to Build a Better Future