Eternal sin
In Christian hamartiology, eternal sins, unforgivable sins, or unpardonable sins are sins which will not be forgiven by God. One eternal or unforgivable sin (blasphemy against the Holy Spirit) is specified in several passages of the Synoptic Gospels, including , , and .
Sin of omission
Paul the Apostle refers to this sin directly when he states "For I do not do the good I want ..." (Romans ).
James the brother of Jesus more exactly defines this sin when he states, "Whoever knows the right thing to do and fails to do it, for him it is sin." (James )