Can blasphemy be forgiven?

Jesus said only one sin won't be forgiven, blasphemy against the Holy Spirit. Matthew 12:31

At church today I was reading 1 Timothy and saw yet another example of God's grace in the apostles Paul's life. He says, "I thank Christ Jesus our Lord, who has given me strength to do his work. He considered me trustworthy and appointed me to serve him, even though I used to blaspheme the name of Christ. In my insolence, I persecuted his people. But God had mercy on me because I did it in ignorance and unbelief. Oh, how generous and gracious our Lord was! He filled me with the faith and love that come from Christ Jesus." - 1 Timothy 1:12‭-‬14 NLT

I found this great resource which says,
"Blasphemy against the Holy Spirit, is any sin that a person clings to by continually resisting the convicting power of the Holy Spirit. Keep in mind that there is not one specific sin that is unforgivable, such as lying, stealing or murder, but rather a perpetual hardening of the heart and willfully sinning against God and man (1 Timothy 4:2; Titus 1:15). In Acts 7:51, Stephen says the following to the Pharisees, "You stiff-necked and uncircumcised in heart and ears! You always resist the Holy Spirit; as your fathers did, so do you.” In a nutshell the unpardonable sin is any sin that a person doesn’t want to give up, confess, or even ask forgiveness for and additionally doesn’t want to hear any more about it from the Holy Spirit."

The article continues, "Any sin mankind wants pardon for is forgivable. However, if we turn our backs on the voice of the Holy Spirit we begin to silence His convictions and eventually we cannot hear His convicting power. This effectively blocks the working of God in our lives because we have reached a point where we are unable to respond to the promptings of the Holy Spirit."