It is not what was before birth that counts. That's after the fact. We're here, so let's live life and do our best at it. We are not here by accident, nor to waste it. Our life is for the purpose of loving our Creator and honoring Him, because He deserves our praise, and for preparing for the afterlife now, not later. To learn how to love, and put that love to purpose, by helping others. If we cannot love here, how will we love each other in heaven? God's plan was that we would never die, and forever live in peace, joy, love, and harmony, forever and never die, and that's the way it was in the beginning, but man decided to become rebellious and sin against God, which caused a break in fellowship with God.
This is called sin, because a wrong was done to Almighty, Holy God, in disrespect, and purposefully. He still loves us, but by our choice, we have put a distance in relationship between us and our Father in heaven, and until we acknowledge that and ask for His forgiveness, we'll STAY separated from God. In other words, if we dragged our sins into heaven with us, it would no longer be heaven, so we must ask Jesus to forgive us of our sins. If not, our sins (NOT God) shall KEEP us separated from God, and shall condemn us, because God is so Holy, He cannot even look upon sin. He is more than willing to save us from the consequences SIN put on us, and when He does, we're brought back into fellowship with God and He erases our sins and forgets them forever, and when we die, heaven is our eternal home. By preparing for our afterlife now, we can be sure of heaven as our eternal destination.