Samuel Logan Brengle emphasizes the necessity of divine power for effective ministry, asserting that while believers receive the Holy Spirit, they require continual renewals of strength to face challenges and opposition. He illustrates this through biblical examples, such as the apostles who, after facing persecution, prayed for renewed power and were filled with the Holy Spirit once more. Brengle also notes that spiritual fatigue can follow victories, and believers must seek God's strength through prayer and His Word to sustain their ministry. He encourages waiting on the Lord for renewal, highlighting that true power comes from a deep relationship with God and His promises. Ultimately, Brengle reassures that God is always present to empower His servants in times of need.