Genesis 28:12 And he dreamed, and behold a ladder set up on the earth, and the top of it reached to heaven: and behold the angels of God ascending and descending on it. - Free Bible Online

      12. he dreamed . . . and behold a ladder--Some writers are of opinion that it was not a literal ladder that is meant, as it is impossible to conceive any imagery stranger and more unnatural than that of a ladder, whose base was on earth, while its top reached heaven, without having any thing on which to rest its upper extremity. They suppose that the little heap of stones, on which his head reclined for a pillow, being the miniature model of the object that appeared to his imagination, the latter was a gigantic mountain pile, whose sides, indented in the rock, gave it the appearance of a scaling ladder. There can be no doubt that this use of the original term was common among the early Hebrews; as JOSEPHUS, describing the town of Ptolemais (Acre), says it was bounded by a mountain, which, from its projecting sides, was called "the ladder," and the stairs that led down to the city are, in the original, termed a ladder (Ne 3:15) though they were only a flight of steps cut in the side of the rock. But whether the image presented to the mental eye of Jacob were a common ladder, or such a mountain pile as has been described, the design of this vision was to afford comfort, encouragement, and confidence to the lonely fugitive, both in his present circumstances and as to his future prospects. His thoughts during the day must have been painful--he would be his own self-accuser that he had brought exile and privation upon himself--and above all, that though he had obtained the forgiveness of his father, he had much reason to fear lest God might have forsaken him. Solitude affords time for reflection; and it was now that God began to bring Jacob under a course of religious instruction and training. To dispel his fears and allay the inward tumult of his mind, nothing was better fitted than the vision of the gigantic ladder, which reached from himself to heaven, and on which the angels were continually ascending and descending from God Himself on their benevolent errands (Joh 1:51).

JFB.