Hi, Juan —

He is talking about one who believes the sin [he|she] has committed is so grave, that even God will not forgive [him|her].

For the Christian, the Holy Spirit leads all mankind to repentance and the forgiveness of sins.

When the Christian says:

"No, the Holy Spirit  or God won't forgive me, so I won't even try to get my sins forgiven because they are too serious."

the Christian ends up playing God Himself — a deadly game!

Jesus through His Church will always forgive any sin — even the sin of abortion, as long as the person has the desire to be forgiven!

I hope this helps,

Mike