The central message of this sermon is that God's plan and purpose are good, faithful, and true, and He will ultimately triumph over evil, suffering, and death. Despite the complexity and difficulties of understanding God's ways, especially in light of the presence of evil and suffering in the world, the sermon asserts that God has a specific plan and purpose that He is working out according to His own power and wisdom. The speaker acknowledges that it may seem strange or even cruel to suggest that God designed some painful or difficult experiences into His plan, but emphasizes that God's ways are not always immediately apparent or understandable to humans. Ultimately, the sermon encourages listeners to trust in God's goodness and faithfulness, despite the challenges and uncertainties of life, and to wait patiently for His ultimate victory over evil and suffering.