T. Austin-Sparks explores the profound mystery of God's hidden ways, as expressed in Isaiah 45:15, where the prophet marvels at God's sovereignty in orchestrating Israel's restoration despite overwhelming odds. He emphasizes that God's methods often defy human understanding, as seen in the unexpected means of deliverance through a Gentile ruler and ultimately through the Incarnation of Christ. Sparks draws parallels between the hiddenness of God's plans for Israel, the Church, and individual believers, highlighting that true understanding comes from faith rather than human reasoning. The sermon culminates in the recognition that God's wisdom and purpose are often concealed, inviting believers to trust in His unfathomable designs.