A.B. Simpson emphasizes the centrality of Jesus Christ in the believer's life, arguing that it is not the blessings, healing, or sanctification that we should seek, but Christ Himself. He shares his journey of understanding that true fulfillment comes from a personal relationship with Jesus, who is the source of all life and strength. Simpson illustrates that relying on Christ transforms our experiences from striving for spiritual achievements to resting in His sufficiency. He encourages believers to see Christ as the answer to every need, emphasizing that it is through Him that we find healing, wisdom, and power for living. Ultimately, the sermon calls for a deeper reliance on Christ, who is the embodiment of all that we need.