Through Zechariah's preaching, God was calling His people not just to a city or a temple but return to their spiritual "homeland" of a relationship with Him. His primary message was that if the people returned to God, God would return to the people. Zechariah is one of the most important prophetic books, containing more detailed prophecies of the coming Messiah than any book, other than Isaiah. Zechariah prophesies that God would give His people His Spirit and bless them forever.