Have you ever been scared that you accidentally blasphemed the Holy Spirit?
Blasphemy against the Holy Spirit referred to the specific sin of the Pharisees in that unique moment (Matthew 12:22-32). They knew Jesus was God in the flesh, yet they refused to acknowledge the truth, so they were never forgive (Mark 3:29). Since Jesus isn’t physically on the earth today, this particular sin cannot happen again.
Today, the only unforgivable sin is when a person continually rejects or denies Jesus despite the Holy Spirit’s conviction of the truth in their heart—past the point of death (John 3:36). After death, it’s too late (Hebrews 9:27).