"And He [God] shall send Jesus Christ, which before was preached unto you: Whom the heaven must receive until the times of restitution of all things, which God hath spoken by the mouth of all his holy prophets since the world began." Acts 3:20,21
The prominent theme woven throughout the Old and New Testament is the Kingdom of God and its ruler, Messiah. Because of all the promises and prophecies pointing toward the exaltation of their nation under Messiah, the Kingdom was the hope and "expectation" of every Israelite (Luke 3:15).
The Scriptures teach three Ways! One is Broad that leads to destruction, contrasted with a Narrow Way that leads to life now. In the future during the Millennial Age, a Highway of Holiness will open, on which it will be easier to walk.