T. Austin-Sparks emphasizes the journey of faith exemplified by Abraham, who left his familiar world behind to seek a heavenly city built by God. This journey involves a deep spiritual separation from earthly ties and a longing for the divine, illustrating that true fulfillment comes from heavenly aspirations rather than earthly possessions. Abraham's life serves as a reminder that believers are called to be pilgrims, never settling for the temporary comforts of this world, but continually seeking a deeper relationship with God. The sermon encourages Christians to recognize their spiritual gravitation towards heavenly things, understanding that true satisfaction lies in the eternal rather than the temporal. Ultimately, it calls for a commitment to live as a heavenly people, relying on spiritual resources and methods rather than worldly ones.