The temple built when Solomon was king was grand and wonderful (1 Chronicles 29:1).
The second temple wasn’t as beautiful. And the workers building it faced trouble. Certain Persian officials tried to stop their work. The story about this is recorded in Ezra chapter 5.
Haggai spoke a message of hope to encourage Zerubbabel, Joshua and the people. They didn’t have to be afraid. They could be strong because God’s Spirit was with them. This is another name for the Holy Spirit. The Spirit had been with the Israelites (Israel) when they left Egypt. At that time God had done many miracles to save them from being slaves. He promised to do mighty acts for his people once again. That is what it meant that he would shake the heavens and the earth. God would take action to make it possible for the Jews to finish building the temple.
Darius was God’s tool to get this done. An important letter from Darius is recorded in Ezra chapter 6. It showed that Darius allowed the Jews to continue building the temple. He made sure that they had all the supplies they needed.
Haggai prophesied about glory, beauty and peace in the temple. Some of these prophecies were fulfilled during the time of Herod the Great. His building projects made the second temple large and wonderful (Mark 13:1). Jews came to understand that the prophecies were about a time in the future. They would be fulfilled in the new creation.