As surely as the possibility of God's existence is evident to humanity, so seems to be the possibility of His non-existence. Although virtually every culture throughout history has believed in at least one deity, arguments for and against the existence of the Christian God have raged for centuries. In his Institutes, John Calvin argued that God has planted the knowledge of His existence in the heart of every man, saying: That there exists in the human mind, and indeed by natural instinct, some sense of the Godhead, we hold to be beyond question, since God himself, so that no man may feign ignorance of him, has endowed all men with an idea of ​​his divinity, the memory of which he constantly renews and occasionally enlarges, which all to man, being aware that there is a God, and that he is their creator, they can be condemned by their own conscience when they do not worship him or devote their lives to his service. The fervor of faith that Christians have in the existence of God necessarily intensifies the desire to extrinsically prove His existence. As Saint Anselm said in his Proslogion: “I do not seek to understand in order to believe, but I believe in order to be able to understand”. Many theologians and philosophers have attempted to bridge this gap between understanding and belief, perhaps attempting to make the transition from what Socrates would call mere opinion, belief without explanation, to knowledge, belief accompanied by an adequate explanation. Creationism is an example of an a posteriori attempt to prove the existence of God; However, perhaps the most hotly debated (and in some sense, densest) argument for the existence of God is the a priori ontological proof of God's existence, first asserted by the 11th century theologian, Saint Anse... middle of the sheet... ....attributes and personality of God.Works Cited1. Baird, Forrest E. and Walter Kaufmann. “Anselm's Proslogion”. In Philosophical Classics: From Plato to Derrida (6th edition). Alexandria, VA: Prentice Hall, 2010.2. Baird, Forrest E. and Walter Kaufmann. “St. The Summa Theologica of Thomas Aquinas”. In Philosophical Classics: From Plato to Derrida (6th edition). Alexandria, VA: Prentice Hall, 2010.3. Baird, Forrest E. and Walter Kaufmann. “The meditations of René Descartes”. In Philosophical Classics: From Plato to Derrida (6th edition). Alexandria, VA: Prentice Hall, 2010.4. Baird, Forrest E. and Walter Kaufmann. "Anselm (and Gaunilo) Gaunilo and Anselm: debate." In Philosophical Classics: From Plato to Derrida (6th edition). Alexandria, VA: Prentice Hall, 2010.5. Calvin, John. "Book I." In Institutes of Christian Religion. Rome: Hendrickson Publishing, 2007.