to give knowledge of deliverance to his people by the remission of their sins

To give to His People a knowledge of salvation In the forgiveness of their sins,

To give knowledge of salvation to his people, through the forgiveness of sins,

To give knowledge of salvation Zacharias now touches the principal subject of the gospel, when he says that the knowledge of salvation consists in the forgiveness of sins. As we are all "by nature the children of wraths" (Ephesians 2:3,) it follows, that we are by nature condemned and ruined: and the ground of our condemnation is, that we are chargeable with unrighteousness. There is, therefore, no other provision for escaping eternal death [1] but by God "reconciling us unto himself, not imputing our trespasses unto us," (2-Corinthians 5:19.) That this is the only righteousness which remains to us before God, may be easily gathered from the words of Zacharias. For whence comes salvation, but from righteousness? But if the children of God have no other way of obtaining the knowledge of salvation except through the forgiveness of sins, it follows, that righteousness must not be sought in any other quarter. Proud men attempt to forge and manufacture a righteousness out of the merits of good works. True righteousness is nothing else than the imputation of righteousness, when God, out of free grace, acquits us from guilt. Besides, it ought to be observed that Zacharias is not speaking of "strangers from the covenants of promise," (Ephesians 2:12) but of the people of God. Hence it follows, that not only does the commencement of righteousness depend on the forgiveness of sins, but it is by imputation [2] that believers are righteous before God to the very end: for they cannot appear before his tribunal in any other way than by betaking themselves daily to a free reconciliation.

Footnotes

1 - "Mortis;" -- "La mort mortelle."

2 - "Imputative, ut italoquar." -- "Par imputation, c'est a dire, d'autant que la justice de Christ laur est imputee." -- "By imputation, that is to say, in so far as the righteousnes of Christ is imputed to them"

To give knowledge of salvation - Knowledge of the "way" of salvation: that it was provided, and that the author of salvation was about to appear.
By the remission of their sins - The word remission means pardon or forgiveness. It implies that God will treat the sinner as if he had not committed the sin. The idea here is, that the "salvation" about to be offered was that which was connected with the pardon of sin. There can be no other. God cannot treat people as his friends unless they come to him by repentance and obtain forgiveness. When that is obtained, which he is always disposed to grant, they can be treated with kindness and mercy.

To (n) give knowledge of salvation unto his people by the (o) remission of their sins,
(n) Open the way.
(o) Forgiveness of sins is the means by which God saves us; (Romans 4:7).

To give knowledge of salvation,.... This is still said of John, and belongs to his work and office; though the Syriac and Arabic versions read, "that he may give"; as if it was spoken of the Lord, before whose face John was to go, and whose ways he was to prepare: by "salvation" is meant, not a temporal salvation, or a deliverance from the Roman yoke, the Jews were expecting, for John gave no intimation of any such salvation; but of a spiritual and eternal salvation, and of Christ himself, the author of it; who is often called Salvation, because he was appointed to this business, was fitted for it, and has effected it; and there is salvation in him, and in no other, the "knowledge" of this is not merely, notional and speculative, but experimental, approbative, fiducial, appropriating, sure, and certain; and is more excellent, than any other kind of knowledge whatever: and this is a "gift"; it is not what is attained unto, and acquired by application, diligence, and industry, as other sort of knowledge; but is a gift of God, though in the use of means, and through the ministry of the word: and so John is said to give it ministerially, he being an instrument in the hand of God, whereby souls came to the knowledge of salvation by Christ, and believed in him: it was communicated by God through his ministry,
unto his people: meaning not the people of John the Baptist, the Jews, though it was true of God's elect among them; but the people of Christ, and that not all mankind, who are his by creation; but a special people, whom the Father has given him, and he has purchased by his blood; whom he conquers by his grace, and makes a willing people, in the day of his power: to these, and only these, is the knowledge of salvation by Christ given; for none else are appointed to it, and for no other is it wrought out. It follows,
by the remission of their sins; the sense of which is, either that salvation is by the forgiveness of sin, and lies in it, that being a principal part of it; see Ephesians 1:7. Sins are debts; forgiving them is a remitting these debts, a loosing them, or the obligation to payment, which is done freely and fully, for Christ's sake, and through his blood; and herein lies the blessedness and salvation of men; see Romans 4:6. Or else that the knowledge of salvation was conveyed through the ministry of John, not by preaching the works of the law, but the doctrine of remission of sins, by Christ; Mark 1:4 and which is the sum and substance of the Gospel, as it was ordered to be preached by Christ, and was preached by his apostles. The Alexandrian copy reads, "our sins".

to give knowledge of salvation--To sound the note of a needed and provided "salvation" was the noble office of John, above all that preceded him; as it is that of all subsequent ministers of Christ; but infinitely loftier was it to be the "Salvation" itself (Luke 1:69 and Luke 2:30).
by the remission of . . . sins--This stamps at once the spiritual nature of the salvation here intended, and explains Luke 1:71, Luke 1:74.

To give knowledge of salvation by the remission of sins - The knowledge of the remission of our sins being the grand instrument of present and eternal salvation, Hebrews 8:11-12. But the immediate sense of the words seems to be, to preach to them the Gospel doctrine of salvation by the remission of their sins.