If you believed that Jesus performed miracles with the help of Satan, it becomes blasphemy against the Holy Spirit. Doubting about Jesus Christ is not a blasphemy.
It is not the question of being glorified after death. The chosen apostles had already become body of the Christ spiritually helping Him in His ministry on earth.
That should not affect our thinking of our responsibility to bear fruit. All the 12 apostles had received the authority to carry on...
I had stopped going to church. But this prompted me to keep going:
Hebrews 10: 25 Not forsaking the assembling of ourselves together, as the manner of some is; but exhorting one another: and so much the more, as ye see the day approaching.