Could the person who commit unforgivable sin (i.e. the Pharisees in GotQuestions article) repent, so his "unforgivable sin" be able to be forgiven?
"Perhaps no other sin has caused greater uncertainty and anguish among Christians and has been more misunderstood
than has the blasphemy against the Holy Spirit. Some think that Jesus has in mind some specific sins that are particularly
grievous. We do well to remind ourselves, however, that all sins are heinous to God, even though some sins might have more drastic consequences than do others. But what did Jesus mean when He spoke about the unforgivable sin? Actually none of these texts say that this sin cannot be forgiven; just that it will not be forgiven. Let's remember: the work of the Holy Spirit is to lead
sinners to an awareness of their sin and to awaken in them the desire to accept Jesus, who alone forgives sin. Blasphemy
against the Holy Spirit,
therefore, must be understood as the DELIBERATE and PERSISTENT repudiation of Jesus' saving work. It occurs when an individual willfully and OBSTINATELY RESISTS the Spirit's
testimony to Christ and His salvation and grace. Jesus isn't talking about someone uttering a few
slanderous words. Blasphemy against the Holy Spirit is committed only in the context of an attitude of persistent
UNBELIEF and open hostility toward Jesus. Blaspheming the
Holy Spirit is not a single
episode; it is a determined way of life.
When the human heart is settled in stubborn opposition to God and, thus, consciously refuses to give Jesus His due, the
heart is hardened and fails to acknowledge the truth of the Holy Spirit's testimony to God's saving sacrifice in Jesus Christ.
This sin is beyond the possibility of forgiveness, not because God is powerless or unwilling to
forgive, but because the person is not able to recognize his/her sin. Therefore, he/she does not
accept forgiveness through Jesus. This attitude, of course, has eternal consequences."
2 Thessalonians 2:10
... They perish because they REFUSED to love the truth and so be saved."
BTW, "a large number of priests became obedient to the faith~Acts 6:7"