“I will give thee for a covenant of the people.”
– Isa_49:8

Jesus Christ is himself the sum and substance of the covenant, and as one of its gifts. He is the property of every believer. Believer, canst thou estimate what thou hast gotten in Christ? “In him dwelleth all the fulness of the Godhead bodily.” Consider that word “God” and its infinity, and then meditate upon “perfect man” and all his beauty; for all that Christ, as God and man, ever had, or can have, is thine-out of pure free favour, passed over to thee to be thine entailed property forever. Our blessed Jesus, as God, is omniscient, omnipresent, omnipotent. Will it not console you to know that all these great and glorious attributes are altogether yours? Has he power? That power is yours to support and strengthen you, to overcome your enemies, and to preserve you even to the end. Has he love? Well, there is not a drop of love in his heart which is not yours; you may dive into the immense ocean of his love, and you may say of it all, “It is mine.” Hath he justice? It may seem a stern attribute, but even that is yours, for he will by his justice see to it that all which is promised to you in the covenant of grace shall be most certainly secured to you. And all that he has as perfect man is yours. As a perfect man the Father’s delight was upon him. He stood accepted by the Most High. O believer, God’s acceptance of Christ is thine acceptance; for knowest thou not that the love which the Father set on a perfect Christ, he sets on thee now? For all that Christ did is thine. That perfect righteousness which Jesus wrought out, when through his stainless life he kept the law and made it honourable, is thine, and is imputed to thee. Christ is in the covenant.
“My God, I am thine-what a comfort divine!
What a blessing to know that the Saviour is mine!
In the heavenly Lamb thrice happy I am,
And my heart it doth dance at the sound of his name.”

HE!

“Yet he hath made with me an everlasting covenant.”
– 2Sa_23:5

This covenant is divine in its origin. “HE hath made with me an everlasting covenant.” Oh that great word HE! Stop, my soul. God, the everlasting Father, has positively made a covenant with thee; yes, that God who spake the world into existence by a word; he, stooping from his majesty, takes hold of thy hand and makes a covenant with thee. Is it not a deed, the stupendous condescension of which might ravish our hearts for ever if we could really understand it? “HE hath made with me a covenant.” A king has not made a covenant with me-that were somewhat; but the Prince of the kings of the earth, Shaddai, the Lord All-sufficient, the Jehovah of ages, the everlasting Elohim, “He hath made with me an everlasting covenant.” But notice, it is particular in its application. “Yet hath he made with ME an everlasting covenant.” Here lies the sweetness of it to each believer. It is nought for me that he made peace for the world; I want to know whether he made peace for me! It is little that he hath made a covenant, I want to know whether he has made a covenant with me. Blessed is the assurance that he hath made a covenant with me! If God the Holy Ghost gives me assurance of this, then his salvation is mine, his heart is mine, he himself is mine-he is my God.
This covenant is everlasting in its duration. An everlasting covenant means a covenant which had no beginning, and which shall never, never end. How sweet amidst all the uncertainties of life, to know that “the foundation of the Lord standeth sure,” and to have God’s own promise, “My covenant will I not break, nor alter the thing that is gone out of my lips.” Like dying David, I will sing of this, even though my house be not so with God as my heart desireth.   C.H. Spurgeon