(2.) From the unspeakable kindness we do to ourselves if we accept this invitation and comply with it. [1.] hereby we secure to ourselves present pleasure and satisfaction: "If you hearken to Christ, you eat that which is good, which is both wholesome and pleasant, good in itself and good for you." God's good word and promise, a good conscience, and the comforts of God's good Spirit, are a continual feast to those that hearken diligently and obediently to Christ. Their souls shall delight themselves in fatness, that is, in the riches and most grateful delights. Here the invitation is not, "Come, and buy," lest that should discourage, but, "Come, and eat; come and entertain yourselves with that which will be abundantly pleasing; eat, O friends!" It is sad to think that men should need to be courted thus to their own bliss. [2.] Hereby we secure to ourselves lasting happiness: "Hear, and your soul shall live; you shall not only be saved from perishing eternally, but you shall be eternally blessed:" for less than that cannot be the life of an immortal soul. The words of Christ are spirit and life, life to spirits (John vi. 33, 63), the words of this life, Acts v. 20. On what easy terms is happiness offered to us! It is but "Hear, and you shall live." [3.] The great God graciously secures all this to us: "Come to me, and I will make an everlasting covenant with you, will put myself into covenant-relations and under covenant-engagements to you, and thereby settle upon you the sure mercies of David." Note, First, If we come to God to serve him, he will covenant with us to do us good and make us happy; such are his condescension to us and concern for us. Secondly, God's covenant with us is an everlasting covenant—its contrivance from everlasting, its continuance to everlasting. Thirdly, The benefits of this covenant are mercies suited to our case, who, being miserable, are the proper objects of mercy. They come from God's mercy, and are ordered every way in kindness to us. Fourthly, They are the mercies of David, such mercies as God promised to David (Ps. lxxxix. 28, 29, &c.), which are called the mercies of David his servant, and are appealed to by Solomon, 2 Chron. vi. 42. It shall be a covenant as sure as that with David, Jer. xxxiii. 25, 26. The covenant of royalty was a figure of the covenant of grace, 2 Sam. xxiii. 5. Or, rather, by David here we are to understand the Messiah. Covenant-mercies are all his mercies; they are purchased by him; they are promised in him; they are treasured up in his hand, and out of his hand they are dispensed to us. He is the Mediator and trustee of the covenant; to him this is applied, Acts xiii. 34. They are the ta hosia (the word used there, and by the Septuagint here)—the holy things of David, for they are confirmed by the holiness of God (Ps. lxxxix. 35) and are intended to advance holiness among men. Fifthly, They are sure mercies. The covenant, being well-ordered in all things, is sure. It is sure in the general proposal of it; God is real and sincere, serious and in earnest, in the offer of these mercies. It is sure in the particular application of it to believers; God's gifts and callings are without repentance. They are the mercies of David, and therefore sure, for in Christ the promises are all yea and amen.