As far as i can discern the mere purpose of existence is to kindle a light in the darkness of our own being. Embrace our darkness so we can understand darkness in others. There is no light without darkness. There is no problem outside of oneself. All conflicts are just self conflicts menifest. All pain that arise from a circumstance are only caused by circumstance. Circumstance don't cause pain they only reveal it to yourself.
With meaning and purpose in our life we can let go of the past. We need meaning and purpose in life to have certainty of what is to come is rather better than we had it in the past. Past is immaterial, we are what we choose to become in the future. We are how we perceive ourselves in the mirror in this moment not some remanent of the past finding its way into the present. There is a brighter future to look forward to, to believe in and wake up to. Everyday. Choose future us. Most people just want to play the part but truth is not based in morality. Our circumstances don’t dictate who we are rather the lens of our reality determines what we become. We are forever becoming something, knowing ourselves why we do what we do is the single greatest thing we can do for us and everyone around us. Otherwise, life is just a meaningless existential dread.