G. Campbell Morgan emphasizes the message of Haggai, addressing the perils faced by the people during adversity, including false contentment, discontent, expectation, and fear. He urges the faithful to take action, reminding them that God is with them and that they must build the temple despite their circumstances. Morgan highlights the importance of patience and obedience, asserting that blessings come from God as a gift rather than a result of human efforts. He warns against longing for the past and expecting immediate results, encouraging believers to focus on their duties and trust in God's timing. Ultimately, the call to 'Be strong and work' encapsulates the essence of Haggai's message.