God Doesn't Remember Our Sin

Observe here,

[1.] How the pardon is expressed; he will blot them out, as a cloud is blotted out by the beams of the sun (ch. 44:22), as a debt is blotted out not to appear against the debtor (the book is crossed as if the debt were paid, because it is pardoned upon the payment which the surety has made), or as a sentence is blotted out when it is reversed, as the curse was blotted out with the waters of jealousy, which made it of no effect to the innocent, Num. 5:23. He will not remember the sin, which intimates not only that he will remit the punishment of what is past, but that it shall be no diminution to his love for the future. When God forgives he forgets.

[2.] What is the ground and reason of the pardon. It is not for the sake of any thing in us, but for his own sake, for his mercies'-sake, his promise-sake, and especially for his Son's sake, and that he may himself be glorified in it.

[3.] How God glories in it: I, even I, am he. He glories in it as his prerogative. None can forgive sin but God only, and he will do it; it is his settled resolution. He will do it willingly and with delight; it is his pleasure; it is his honour; so he is pleased to reckon it. - Matthew Henry