Again you operate from a false premise
, you should be aware of the 6 sins against the Holy Spirit: Presumption, Despair, Resisting the known truth, Envy of another’s spiritual good, Obstinacy in sin, Final impenitence,
This is interesting.
Q. 917. What is the presumption of God's mercy? A. A foolish confidence of salvation, without leading a good life, or any care to keep the commandments; such as they entertain who think they will be saved by faith only, without good works.
Ephesians 2:8-9 For by grace you have been saved through faith and not that of yourselves; it is the gift of God, not as a result of works, lest anyone should boast.
However, the Bible noted a sin against the Holy Spirit was when the Pharisees attributed Jesus' ability to cast out demons was due to Him doing so in the name of Beelzebub.
In other words, they were rejecting Christ.
To reject Christ is the only unforgiveable sin. If not, then what is 1 John 1:9 for?
If we confess our sins, He is faithful and righteous to forgive us our sins and to cleanse us from all unrighteousness.
Your comment: “In other words, they were rejecting Christ.
To reject Christ is the only unforgiveable sin”
Then many here seem to reject God by rejecting His Word and rejecting His Church.