Tertullian

“ Since, therefore, that which will have to be feared after death, even the punishment of hell, belongs to the Creator, the denier, too, belongs to the Creator. As with the denier, however, so with the confessor: if he should deny God, he will plainly have to suffer from God, although from men he had nothing more to suffer after they had put him to death. And so Christ is the Creator’s, because He shows that all those who deny Him ought to fear the Creator’s hell. ”

“ Now, He who will confess the confessor is the very same God who will also deny the denier of Himself. Again, if it is the confessor who will have nothing to fear after his violent death, [11] it is the denier to whom everything will become fearful after his natural death. ”

“ After deterring His disciples from denial of Himself, He adds an admonition to fear blasphemy: “Whosoever shall speak against the Son of man, it shall be forgiven him; but whosoever shall speak against the Holy Ghost, it shall not be forgiven him.” [12] Now, if both the remission and the retention of sin savour of a judicial God, the Holy Ghost, who is not to be blasphemed, will belong to Him, who will not forgive the blasphemy; just as He who, in the preceding passage, was not to be denied, belonged to, Him who would, after He had killed, also cast into hell. ”