And hath put all things under His feet, and gave Him to be the head over all things to the Church, Which is His body, the fulness of Him that filleth all in all. – Ephesians 1:22, 23

Consider the relationship of Christ to His own people. Now we get on sure ground, and feel a rock beneath our feet. Long before the heavens and the earth were made, God with prescient eye beheld the person of His Son as God in human nature, and He saw all His elect lying in Him. The Church is His body, “the fulness of Him that filleth all in all.” God the Father saw in the divine decree the mystical Christ, and He was well pleased with all His redeemed for Christ Jesus’ sake. How wondrous was that transaction when in the council-chamber of eternity the covenant was made, and the Lord Jesus Christ became the surety of that covenant. He entered into covenant with the eternal God on the behalf of His chosen that He would make atonement for their sin, and would perfect the righteousness which should cover every one of them, and make them to be accepted in the Beloved. No actual sacrifice was offered for thousands of years; but see how great this man was, since on the strength of His bare promise the Lord continued to save men for thousands of years, admitting them to His infinite glory before the Mediator had appeared, or the Redeemer had put a hand to the work. Consider that you and I, and all of us who are in Christ, are this day beloved for His sake, accepted for His sake, justified for His sake. Still doth God embrace us in the arms of almighty love for His sake; for His sake heaven is being prepared for us; for His sake the treasures of the infinite are given to us; because we are the covenanted ones for whom He pledged His troth, and for whom in the fulness of time He poured out His heart’s blood, that He might redeem us unto God. “Consider how great this man was.” He is so great that all the saints are blessed in Him. He is so great that we, as many as have believed, dwell evermore in the clefts of this great Rock, and find in Him our castle and high tower. For ye are dead, and your life is hid with Christ in God. When Christ, who is our life, shall appear, then shall ye also appear with Him in glory. “Consider how great this Man was.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1835.cfm