In the blog article linked above, C. Michael Patton attempts to respond to this question (Have I committed the unpardonable sin?) that he has received from other Christians.
Can a Christian even commit the unpardonable sin? Given that God causes His elect to persevere (be preserved) to the end, I would answer “no.” Those who have the Holy Spirit dwelling in them (all Christians) cannot blaspheme the Holy Spirit.
- What Do You Say To The Person Who Has Committed The Unpardonable Sin? (writelyons.wordpress.com)