" Part of the glory of the Christian faith is that at its heart is a God who is a person. “He who is,” the father of Jesus Christ and our father, is infinite, but he is also personal. The Christian faith therefore places a premium on the absolute truthfulness and trustworthiness of God, so understanding doubt is extremely important to a Christian. "

― Os Guinness , God in the Dark: The Assurance of Faith Beyond a Shadow of Doubt