Treasury of Scripture Knowledge
wherefore I declare to you, all manner of sin and blasphemy shall be forgiven men; but blaspheming the holy Spirit
and whoever shall cast a reflection upon the son of man, it shall be forgiven him; but as for him, that shall blaspheme the holy spirit, it shall not be forgiven.
For it is impossible for those who were once enlightned, and have received the heavenly gifts, communicated by the holy spirit,
for if we wilfully apostatize, after having received the knowledge of the truth, it is as a sin for which there is no sacrifice appointed.
1 John 5:16
If any man see his brother commit a sin, which is not a mortal sin, let him pray to God, who will grant him life, for such as do not commit a mortal sin. there is a sin unto death: in which case I do not enjoin any prayer to be made.