Zechariah emphasized that God has used His prophets to teach, warn and correct His people. Unfortunately, they refused to listen. Their sin brought God's punishment. The book also bears evidence that even prophecy could be corrupted. History shows that in this period prophecy fell into disfavor among the Jews, leading to the period between the Testaments when no lasting prophetic voice spoke to God's people.
The Book of Zechariah teaches that salvation may be obtained by all. The last chapter depicts peoples from all over the world coming to worship God, who desires that all people follow Him. This is not the doctrine of universalism, i.e., that all people would be saved because it is God's nature to save. Rather, the book teaches that God desires that all people worship Him and accepts those who do, regardless of their national or political expressions, as in the freeing of Judah and Jerusalem from their political enemies. Finally, Zechariah preached that God is sovereign over this world, any appearance to the contrary notwithstanding. His visions of the future indicate that God sees all that will happen. The depictions of God's intervention in the world teach that ultimately He will bring human events to the end He chooses. He does not eliminate the individual's freedom to follow God or rebel, but holds people responsible for the choices they make. In the last chapter, even the forces of nature respond to God's control.