RE: Forgiveness of Sins | MCGI Topic Review

This is quite difficult, and I must say English is not my home language. I believe that the only way to heaven is through Jesus Christ, by believing that He died for our sins and by repenting. I also believe all sins are forgivable, except for sin against the Holy Spirit. The question, I cannot answer is to say what sin is sin against the Holy Spirit?

Thank you for a good post.