Psalms 89:35

The Lord anointed David with the holy oil, not only as an emblem of the graces and gifts he received, but as a type of Christ, the King Priest, and Prophet, anointed with the Holy Ghost without measure. David after his anointing, was persecuted, but none could gain advantage against him. Yet all this was a faint shadow of the Redeemer's sufferings, deliverance, glory, and authority, in whom alone these predictions and promises are fully brought to pass. He is the mighty God. This is the Redeemer appointed for us, who alone is able to complete the work of our salvation. Let us seek an interest in these blessings, by the witness of the Holy Spirit in our hearts. As the Lord corrected the posterity of David for their transgressions, so his people shall be corrected for their sins. Yet it is but a rod, not a sword; it is to correct, not to destroy. It is a rod in the hand of God, who is wise, and knows what he does; gracious, and will do what is best. It is a rod which they shall never feel, but when there is need. As the sun and moon remain in heaven, whatever changes there seem to be in them, and again appear in due season; so the covenant of grace made in Christ, whatever alteration seems to come to it, should not be questioned.

Once have I sworn by my holiness that I will not lie unto David. Because he could swear by no greater he swore by himself, and by that peculiar attribute which is his highest glory, being the subject of threefold adoration by all the hosts of heaven. God here pledges the crown of his kingdom, the excellent beauty of his person, the essence of his nature. He does as good as say that if he ceases to be true to his covenant he will have forfeited his holy character. What more can he say? In what stronger language can he express his unalterable adherence to the truth of his promise? An oath is the end of all strife; it ought to be the end of all doubt on our part. We cannot imagine that God could lie, yet he puts it so —that if the covenant were not kept by him, he would regard it as a lie. Here is ground for strong confidence; may our faith be of such a nature as these assurances will warrant.