In the first place, they retained the hope of a king of David's line--a human king who should conquer the enemies of Israel. When it was held in a one-sided form this was a dangerous hope. It led logically to materialistic conceptions of the kingdom of God and to political unrest. It led to the effort of the Jews to take Jesus by force and make him a king. John 6:15. It led to the quarrel of the disciples about the chief places in the kingdom. Matt. 18:1-4; Mark 9:33-35; Luke 9:46,47. This conception of the Messiah had to be corrected by Jesus. "My kingdom is not of this world." John 18:36.
Yet even where the Messiah was conceived of as an earthly ruler, the spiritual hope was by no means always and altogether lost. The "Psalms of Solomon," for example, Pharisaic psalms of the first century before Christ, though they look for an earthly ruler, picture him as one who shall rule in righteousness. "And a righteous king and taught of God is he that reigneth over them; And there shall be no iniquity in his days in their midst, for all shall be holy and their king is the Lord Messiah" (Ps. Sol. xvii, 35, 36. See Ryle and James, "Psalms of the Pharisees," especially pp. 137-147). No iniquity in the days of the Messiah! That is true understanding of the Old Testament, even joined with the political ideal.
In the second place, however, the Messianic age is sometimes in later Judaism conceived of as purely supernatural. The Messiah is not an earthly ruler, merely helped by God, but himself a heavenly being, a preëxistent "Son of Man," judge of all the earth. The Messianic age is ushered in not by human warfare, but by a mighty catastrophic act of God. Not a liberated Canaan is here the ideal, but a new heaven and a new earth.
This transcendental, supernaturalistic form of the Messianic hope appears in the "Book of Enoch" and other "apocalypses." Its details are fantastic, but it was by no means altogether wrong. In many respects it was a correct interpretation of the divine promise. The new heavens and the new earth are derived from Isa. 65:17. The doctrine of the two ages was accepted by Jesus and by Paul--for example Matt. 12:32; Gal. 1:4; Eph. 1:21. The heavenly "Son of Man" goes back to Dan. 7:13,14. The Book of Enoch was not altogether wrong. Its use of the title "Son of Man" prepared for the title which Jesus used.