Stephen, Many scriptures show God’s promise to forgive all sins upon our sincere repentance. Repentance requires yielding ourselves to God, the working of His Spirit and His Son. Blaspheming the Holy Spirit is an unpardonable sin because those who practice such are refusing to yield themselves to God’s work in their lives. They have so hardened themselves against it that even when the power of God’s Spirit is clearly evident, they knowingly speak evil of it, attributing it to the power of Satan. The answer to your question, when putting all of the scriptures together, is that God will forgive any and all sins upon sincere repentance. To blaspheme the Holy Spirit, with knowledge, puts a person outside of such a workable relationship because they are resisting the power and presence of God. However, if one is concerned that they have blasphemed the Holy Spirit in the past and they come to God in sincere and humble repentance, seeking to be right with Him, they can be confident in knowing He is faithful and just to forgive them their sins and to cleanse them from all unrighteousness. (1 John 1:9) Paul Moody