like some of us knows that if you sin against the father you will be forgiving, sin against the son you will be forgiving too but if you sin against the holy spirit you will not be forgiving, I really want to know the sin you will sin against the holy spirit and you will not be forgiving in this world of evil where a lot of sin is taking place nothing is new again.

Firstly, i want you to read matthew chapt 12 vs 1-50.
Based on my understand or let me say the way i see it in my perceptive. Let me site an example for better clarification and lucidity. Let assume a pastor heal a victim of HIV during deliverance and it's medically confirm but out of self interest and ignorance you keep telling people that the pastor use an evil spirit to heal people, despite the fact you have tasted his miracle. you blasphemy the holy ghost and not the pastor.