The Pharisees acknowledged Jesus as a son of man but not as the Son of God. In this context it is clearly seen that to blaspheme against the Holy Spirit is to deny Jesus as being from God. On the cross Jesus took all the sin of the whole world, expect ONE sin. John 16:8-9 says that the only sin that remains is to not believe in Jesus. This is the only sin that has not been forgiven and will never be forgiven, and therefore people need to repent from this sin (by changing their thinking/belief) and believe in Jesus. Then surely they will be saved, because whoever believes and confesses Jesus shall be saved.
Katika msalaba Yesu alichukuwa kila dhambi ya ulimwengu wote, tajaria dhambi MOJA. Yohana 16:8-9 ina sema ya kwamba ya pekee inayo baki ni Kuto amini katika Yesu. Hii ndiye tu dhambi ambayo haicha semehewa na haiwezi kusehemewa mpaka watu wanahitaji kutubu toka kwa hii dhambi (kubadilisha fikiri/kaumini) na kuamini katika Yesu. Hapo kwa uhakika wata okoka, kwa sababu wowote aiminiye na akiriye Yesu ataokoka.