In this groundbreaking volume, philosopher Richard Swinburne constructs a meticulous metaphysical framework to examine the fundamental question: what does it mean for God to exist? Applying this system to the core tenets of Christian doctrine, Swinburne delves into the nature of the divine, scrutinizing the concepts of substance, cause, time, and necessity. He then builds upon this foundation to articulate the simplest and most compelling account of God's nature, before exploring the implications of this understanding for the Trinity and the Incarnation. Through a rigorous and systematic approach, Swinburne presents a powerful case for the Christian vision of God, offering a profound and thought-provoking contribution to the philosophy of religion.