T. Austin-Sparks emphasizes the significance of understanding the nature of the current dispensation, which is characterized by the absence of Jesus on earth and the presence of the Holy Spirit. He explains that this spiritual reality leads to internal conflicts when believers fail to recognize their heavenly calling and the purpose of suffering in their lives. The preacher highlights that true spiritual growth comes through adversity and that the Holy Spirit is essential for achieving spiritual fullness. Ultimately, he encourages believers to focus on eternal values rather than temporal concerns, as the Lord is more interested in their spiritual measure than in their earthly achievements.