Forgiveness, by God only
Only God has the authority to forgive sins, like a ruler pardoning treason.
As the prince or ruler only has power to pardon treason in his subjects, so God only has power to forgive sin. As no man can forgive a debt but the creditor to whom the debt is due; so God only can forgive us our debts, whose debtors we are to an inevaluable amount.
