Sin (unforgivable)

Pride causes sin to enter a person. 1 Timothy 3:6

Blasphemy (Speaking) against the Holy Ghost will not be forgiven. Matt. 12:31-32 Blasphemy against the Holy Ghost (Spirit) will not be forgiven. Mark 3:29, Luke 12:10 Grieve not the Holy Spirit that seals you until the day of redemption. Eph.4:30

To rebel and vex the Holy Spirit is to fight against Him and become His enemy, whom He will fight against. Isa.63:10