Genesis 32:24 And Jacob was left alone; and there wrestled a man with him until the breaking of the day. - Free Bible Online

      24, 25. There wrestled a man with him--This mysterious person is called an angel (Ho 12:4) and God (Ge 32:28, 30; Ho 12:5); and the opinion that is most supported is that he was "the angel of the covenant," who, in a visible form, appeared to animate the mind and sympathize with the distress of his pious servant. It has been a subject of much discussion whether the incident described was an actual conflict or a visionary scene. Many think that as the narrative makes no mention in express terms either of sleep, or dream, or vision, it was a real transaction; while others, considering the bodily exhaustion of Jacob, his great mental anxiety, the kind of aid he supplicated, as well as the analogy of former manifestations with which he was favored--such as the ladder--have concluded that it was a vision [CALVIN, HESSENBERG, HENGSTENBERG]. The moral design of it was to revive the sinking spirit of the patriarch and to arm him with confidence in God, while anticipating the dreaded scenes of the morrow. To us it is highly instructive; showing that, to encourage us valiantly to meet the trials to which we are subjected, God allows us to ascribe to the efficacy of our faith and prayers, the victories which His grace alone enables us to make.

JFB.