If there is a sin which you believe God cannot forgive, just remember that there are a whole host of sins mentioned in the Bible that true believers have committed, and yet they are still part of God’s family.
The Bible talks about believers who commit idolatry (1 Kings 11:1-10).
Others believe only for a while and then fall away (Luke 8:13).
We read of some who do not continue in the Word of Christ (John 8:31), do not abide in Christ (John 15:1-8), become disqualified in the race of the Christian life (1 Cor 9:24-27), or resist God’s correction up to the point of physical death (1 Cor 11:30-32).
Still others stray from the faith (1 Tim 1:5-6), shipwreck their faith (1 Tim 1:18-20), fall away from the faith (1 Tim 4:1-3), deny the faith (1 Tim 5:8), cast off initial faith to follow Satan (1 Tim 5:12-15), stray from the faith by loving money (1 Tim 6:9-10), teach false doctrine (1 Tim 6:20-21), and deny Christ and live faithless lives (2 Tim 2:11-13).
We have the examples of people in the Bible who murdered and yet are part of God’s family (Jacob’s sons).
Other men like Solomon, Amaziah and Uzziah will most likely be in heaven, but did not live faithfully to God during their lives.
There is Lot who committed incest with his daughters, Ananias and Sapphira who lied to the church and to the Holy Spirit and who died as a result, but will still be in heaven.
Scripture is full of examples of people who committed almost every sort of sin, and yet by every indication, were still forgiven by God and will spend eternity with God in heaven.
The grace of God runs deeper and wider than most of us will ever know. The ocean of God’s grace never runs dry. The limits of God’s grace are never reached.
No matter what you have done, there is forgiveness for all your sins through the grace and mercy of God.