T. Austin-Sparks emphasizes the significance of understanding and knowing God over worldly pursuits such as wisdom, power, and riches, as highlighted in Jeremiah 9:23-24. He discusses how the prophets, including Jeremiah, conveyed God's thoughts and warnings to Israel, representing a divine plan for humanity. Sparks warns against the cults of intellectualism, power, and riches, which distract from true spiritual life and lead to moral decline. He asserts that true glory lies in a relationship with God, which surpasses all earthly achievements and possessions. Ultimately, the sermon calls for a return to valuing spiritual understanding above all else.