Excerpt from A.W. Tozer's Knowledge of the Holy
(Chapter 5: "The Self-Existence of God"):
"The human mind, being created, has an understandable uneasiness about the Uncreated. We do not find it comfortable to allow for the presence of One who is wholly outside of the circle of our familiar knowledge. We tend to be disquieted by the thought of One who does not account to us for His being, who is responsible to no one, who is self-existent, self-dependent and self-sufficient."