Here is some portions of the sermon by Spurgon regarding "The Lord Our Righteousness"
When we believe in Christ, by faith we receive our justification. As the merit of his blood takes away our sin, so the merit of his obedience is imputed to us for righteousness. We are considered, as soon as we believe, as though the works of Christ were our works. God looks upon us as though that perfect obedience, of which I have just now spoken, had been performed by ourselves,—as though our hands had been bony at the loom, an though the fabric and the stuff which have been worked up into the fine linen, which is the righteousness of the saints, had been grown in our own fields. God considers us as though we were Christ—looks upon us as though his life had been our life—and accepts, blesses, and rewards us as though all that he did had been done by us, his believing people.
Spurgeon went on to say…
Imputation, so far from being an exceptional case with regard to the righteousness of Christ, lies at the very bottom of the entire teaching of Scripture. How did we fall, my brethren? We fell by the imputation of Adam's sin to us. Adam was our federal head; he represented us; and when he sinned, we sinned representatively in him, and what he did was imputed to us. You say that you never agreed to the imputation. Nay, but I would not have you say thus, for as by representation we fell, it is by the representative system that we rise. The angels fell personally and individually, and they never rise, but we fell in another, and we have therefore the power given by divine grace to rise in another. The root of the fall is found in the federal relationship of Adam to his seed; thus we fell by imputation. Is it any wonder that we should rise by imputation? Deny this doctrine, and I ask you—How are men pardoned at all? Are they not pardoned because satisfaction has been offered for sin by Christ? Very well then, but that satisfaction must be imputed to them, or else how is God just in giving to them the results of the death of another, unless that death of the other be fire? of all imputed to them? When we say that the righteousness of Christ is imputed to an believing souls, we do not hold forth an exceptional theory, but we expound a grand truth, which is so consistent with the theory of the fall and the plan of pardon, that it must be maintained in order to make the gospel clear. I think it was this doctrine which Martin Luther called the article of standing or falling of the Church. I find a passage in his works which seems to me to refer to this doctrine rather than to justification by faith. He ought certainly to have said, "Justification by faith is the doctrine of standing or falling of the Church." But in Luther's mind, imputed righteousness we, so interwoven with justification by faith, that he could not see any distinction between the two. And I must confess, in trying to observe a difference, I do not see much. I must give up justification by faith if I give up imputed righteousness. True justification by faith is the surface soil, but then imputed righteousness is the granite rock which lies underneath it; and if you dig down through the great truth of a sinners being justified by faith in Christ, you must, as I believe, inevitably come to the doctrine of the imputed righteousness of Christ as the basis and foundation on which that simple doctrine rests.
He continued to say…
You have a better righteousness than Adam had. He had a human righteousness; your garments are divine. He had a robe complete, it is true, but the earth had woven it. You have a garment as complete, but heaven has made it for you to wear. Go up and down in the strength of this great truth and boast exceedingly, and glory in your God; and let this be on the top and summit of your heart and soul: "Jehovah, the Lord our righteousness."
Moreover, it is also everlasting righteousness. Oh! this is, perhaps, the fairest point of it—that the robe be shall never be worn out; no thread of it shall ever give way. It shall never hang in tatters upon the sinner's back. He shall live, and even though it were a Methusaleh's life, the robe shall be as if it were woven yesterday. He shall pass through the stream of death, and the black stream shall not foul it. He shall climb the hills of heaven, and the angels shall wonder what this whiteness is which the sinner wears, and think that some new star is coming up from earth to thine in heaven. He shall wear it among principalities and powers, and find himself no whit inferior to them all. Cherubic garments and seraphic mantles shall not be so lordly so priestly, so divine, as this robe of righteousness this everlasting perfection which Christ has wrought out, and brought in and given to all his people. Glory unto thee, O Jesus, glory unto thee! Unto thee be hallels for ever; Hallelu—jah! Thou art you—"Jehovah, the Lord our righteousness."
