Andrew Murray emphasizes the necessity of yielding to the Spirit of God to overcome the deceptive spirit of the world. He explains that true influence over others comes from a life that is spiritually separated from worldly desires, rather than from mere physical withdrawal. The blinding influence of the world can even affect believers, preventing them from fully grasping God's teachings. By fully devoting ourselves to Christ and embracing a heavenly life, we gain the strength to selflessly serve others and effectively impact their lives.