Genesis 28:12

Behold a ladder set up on the earth This might represent, 1st, The providence of God, by which there is a constant correspondence kept up between heaven and earth. The counsels of heaven are executed on earth, and the affairs of this earth are all known in heaven. Providence doth his work gradually and by steps; angels are employed as ministering spirits to serve all the designs of Providence, and the wisdom of God is at the upper end of the ladder, directing all the motions of second causes to his glory. The angels are active spirits, continually ascending and descending; they rest not day nor night. They ascend to give account of what they have done, and to receive orders; and descend to execute the orders they have received. This vision gave seasonable comfort to Jacob, letting him know that he had both a good guide and good guard; that though he was to “wander from his father's house,” yet he was the care of Providence, and the charge of the holy angels. 2d, The mediation of Christ. He is this ladder: the foot on earth in his human nature, the top in heaven in his divine nature; or, the former is his humiliation, the latter is his exaltation. All the intercourse between heaven and earth since the fall is by this ladder. Christ is the way: all God's favours come to us, and all our services come to him, by Christ. If God dwell with us, and we with him, it is by Christ: we have no way of getting to heaven but by this ladder; for the kind offices the angels do us, are all owing to Christ, who hath reconciled things on earth and things in heaven, Colossians 1:20.