He had a dream in which he saw a stairway resting on earth, with its top reaching to heaven, and the angels of God were ascending and descending on it. (Genesis 28:12)

This delightful children's song was inspired by the account of Jacob's dream at Bethel as recorded in Genesis 28:10-22. In this dream, Jacob saw a stairway or ladder resting on earth with its top reaching to heaven, with God's angels or messengers ascending and descending on it.
From Jacob's dream we learn that the gap between earth and heaven can be bridged. Although God revealed Himself in times past to various individuals as He did to Jacob, His full self-revelation required a God-Man, the Son of God in all of His deity and the Son of Man in full humanity to span the mighty gulf. Jesus Christ became the ladder for man to reach heaven and to enjoy even now a restored fellowship with the heavenly Father.
Keep this perspective in all you do: As Christians we are merely travelers in this life, moving forward and upward to our heavenly home. Even now, however, we have God’s messengers to help us live victoriously. Give Christ your thanks for making all of this possible.

Osbeck, K. W. (1990). Amazing grace : 366 inspiring hymn stories for daily devotions. Includes indexes. (Page 97). Grand Rapids, Mich.: Kregel Publications.