If entrance into heaven must be earned and God is a just God, then you must accept the terms God has revealed to accomplish that. In Leviticus 17:11, God said, "For the life of the flesh is in the blood: and I have given it to you upon the altar to make an atonement for your souls: for it is the blood that maketh an atonement for the soul. This means his terms say only blood - meaning the offering of a life - atones for sin. He does not accept good deeds or works of righteousness as payment for our sins, but blood. The Jewish high priest on the Day of Atonement would enter into the Holy of Holies and make an offering of blood upon the Mercy Seat of the Ark of the Covenant. This was done after fasting, confession and prayers by the people. The blood offering was to make "atonement" for the sins of the people. It was a covering for sins but its main purpose was to point to the Messiah who was to come.
In the New Testament, Paul says to the Christians in Rome, "For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord. (Romans 6:23). The payment God required for sin had and has not ever changed, but the Messiah now HAS come and, by Jesus' sacrifice of his life in our place, we have had our sins paid for. He is our propitiation - meaning a satisfactory payment - for all the sins of the world. God the Son came to earth, incarnated in the flesh, lived a perfect sinless life (because that was the only way an offering could be done for all) and is now our sacrifice in our place for our sins. Our sin debt has been paid in full. Jesus said, "It is finished." and eternal life is offered to us as a gift of God's grace. We receive this grace by faith, Ephesians 3:8,9 "For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast.
So, yes, God is just and all holy and cannot look upon sin, but he is also merciful, full of grace and lovingkindness he does not wish that any should perish but all come to the knowledge of the truth. And this is the truth, "But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us." (Romans 5:8) Jesus affirmed this when he said, "For God so loved the world that he gave his only begotten son, that whosoever believeth in him, should not perish but have everlasting life." (John 3:16)
Salvation is a gift of grace that God gives to us when we trust in him by faith. We cannot earn it, merit it or do anything to deserve it.
We have not had our personal sins paid for yet (per se) Every sin we commit is there on the cross. Time is mystical in this situation.
Jesus opened the Gates and that was His mission - the cross, the cross - the crucifix.
We cannot earn it, merit it etc. - Christ did it for us.
Our own free will Must join in though - we are just creatures.
You honestly think that your works are going to indebt God to you? That the Creator of the Universe is going to be a DEBTOR to YOUR works that you think earn you entrance into HIS HEAVEN?
That is some big moxy you have going on. Yes, by all means, clear your throat and present Him with your bill of righteous works that gives you the right to enter His Kingdom.