I suppose I’ve been asked it almost more than any other question over the years: What is the unforgivable sin? Very often the person who is asking is convinced they have committed it.
But notice what Jesus first said: “All the sins and blasphemies of men will be forgiven them.”
There is only one exception: the person who deliberately rejects the Holy Spirit’s witness that Jesus is the Savior, sent from Heaven to save us from our sins. The only sin God cannot forgive is the sin of rejecting Christ. Turn to Him in repentance and faith – and He will forgive.
I tell you the truth, all the sins and blasphemies of men will be forgiven them. But whoever blasphemes against the Holy Spirit will never be forgiven; he is guilty of an eternal sin.
Billy Graham – Wisdom For Each Day