1st John 1:9 If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.
In other words, it is the prerogative of God alone to decide whose sins are pardoned, and whose sins are retained. This is the reason why the power to grant pardons and forgiveness was never given to man for God knew that it would inevitably be abused, and misused in cases where quid pro quo is practiced. And so said so done, because as the early Christian church gradually departed from the pure principles of truth, the demons of quid pro quo entered.
And they wreaked havoc on what was meant to be good when applied in harmony with scriptural instruction. The God of heaven clearly states the condition upon which pardon and forgiveness are to be offered and even then, God ultimately has the final word in the matter. Thus, for mortals to come along and change the terms and conditions is the equivalent of sitting in the seat of God, or trying to play God.
Ezekiel 33: 14 Again, when I say unto the wicked, thou shalt surely die; if he turns from his sin, and he does that which is lawful and right; 15 If the wicked restores the pledge, give again that he had robbed, walk in the statutes of life, without committing iniquity; he shall surely live, he shall not die.
Ezekiel 33:16 None of his sins that he hath committed shall be mentioned unto him: he hath done that which is lawful and right; he shall surely live.
May The Lord add His blessing to the study of His word. God bless!