 Reidhead's experiences in Sudan deeply impacted the core values that would later guide his life.A spiritual crisis during this period—as he described two decades later in what is probably his best-known recorded teaching, "Ten Shekels and a Shirt"—left Reidhead with the conviction that much of evangelicalism had adopted utilitarian and humanistic philosophies contradictory to Biblical teaching.The end of all being, he came to believe, was not the happiness of man, but the glorification of God.