Psalms 89:30

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.

If his children forsake my law, and walk not in my judgments. It was possible, terribly possible, that David's posterity might wander from the Lord; indeed they did so, but what then? Was the mercy of God to pass away from David's seed? —far from it. So, too, the seed of the Son of David are apt to start aside, but are they therefore cast away? Not a single word gives liberty for such an idea, but the very reverse. Expositors in their fear of Calvinistic doctrine shake off the fear of adding to the word of God, or else they would not have spent their time in talking about "the conditions" of this absolutely unconditional covenant.