What meanings can be ascribed to the existence of God? This question has been investigated by prominent thinkers throughout the ages, and led several of them to suggest arguments for proving this existence and explaining its meaning. The first part of this book reviews some of these proofs and their criticism. Following this discussion, it suggests a new meaning and characterization of God as a connector between different types of entities. This idea sheds new light on several interesting problems, including the emergence of plurality in reality from the unity of God. The second section deals with God and the human mind, and focuses mainly on the mind-body bifurcation problem, the problem of free will, and the existence of consciousness and soul. The third part discusses several problems associated with God and the world. Special emphasis is laid here upon God and the laws of nature, the creation of the universe, and the impact of modern Physics on the belief in God's existence.