2 Corinthians 12.21 records, I will grieve for many of those who previously sinned and have not repented of the impurity, sexual immorality, and licentiousness that they have practiced.
The knock on Christianity from adherents of other religions is the ease by which Christians are able to get to heaven. Christianity is the only religion that claims it’s means to heaven is the receiving of it freely from God as a gift imparted by God’s grace through faith in His love and kindness.
It is not that it cost God nothing, for He Himself bankrupt heaven in order to purchase humanity from the just condemnation of eternal judgement in hell. This purchase was made not by gold but by blood, the blood of God in the Son of God Whom Christians call Jesus the Savior. Since the means to heaven could only be paid by God, it is only God Who can give that means away to people.
It is not a commodity that can be earned by people. The Christian perspective is that heaven is a free gift given by God to those who seek Him for it. So why should Christians do good if they are already given access to heaven as a gift? This is the issue Paul addresses in this chapter of the Bible and a question even the church itself found asking. The answer is that the purchase of heaven by God was also the purchase of all those who will live with God in heaven.
As a people bought by God they are no longer free to live as though God did not exist. The life we used to live free from God brought us death, pain and suffering though we though it would bring us pleasure and happiness. The new life we have under the rule of God in Jesus is the truly abundant, happy life.
Our greatest joy is not in self-seeking pleasures but in God seeking service to others. When we give our lives away we find them; we don’t find them in the keeping of our lives for ourselves. The happiest people, the most fulfilled people are those who constantly give their time, talent and treasure for the benefit of others to the glory of God. This is exactly how Jesus lived. Christians, are not mere believers in God, nearly everyone does that, but they are followers of Jesus the Christ Who lived only to serve the Father in perfect harmony with the Father.
Christians live God pleasing lives for the benefit of others. Such lives are free from moral decadence because the decadent life is not useful to others nor does it help others but rather destroys our own selves and almost always takes from others without giving them anything. Christians are freely forgiven by God because of the cost God paid to forgive them which causes them to live grateful lives pleasing to God demonstrated by their usefulness to others.