This message introduces us to the God of Haggai, who is the Lord of Hosts who has history planned and uses people to declare His unchanging word,

The Command to Rebuild the Temple
1 In the second year of Darius the king, in the sixth month, on the first day of the month, the word of the Lord came by the hand of Haggai the prophet to Zerubbabel the son of Shealtiel, governor of Judah, and to Joshua the son of Jehozadak, the high priest:
Haggai 1:1 English Standard Version (ESV)