Critique of Ideas for the Existence of GodFor thousands of years the idea of ​​God has been questioned and proposed by philosophers, scientists and scholars. Many have argued for and against its existence and it is still hotly debated today. Since God is the concept of an entity that no one has ever seen or heard, it has been a strenuous struggle to prove his existence. However, great philosophers have always found ways to validate the idea of ​​God through their own way of reasoning. Philosophical discussions on the existence of God began with pre-modern philosophers like Plato, St. Augustine, and were further examined by modern philosophers like Descartes etc. In this essay I will present Saint Augustine and Descartes' arguments for the existence of God and offer my criticism based on my reasoning. Among the many philosophers who have tried to prove the existence of God, one of the earliest attempts was formed by a Christian theologian and pre-modern philosopher, Saint Augustine. In his book On the Free Choice of the Will, Saint Augustine writes about free will and determines its origins, but in doing so he also demonstrates the existence of God and his goodness. To do this, Augustine first establishes the existence of the self by arguing that knowledge of the self comes first and is an indisputable notion. He then states that things can be separated into three classes: those that exist, those that live, and those that possess intelligence. (Williams, 1993, p.35) Proposes that humans are superior to both existing and living beings because the latter lack understanding and therefore this brings humans closer to God. Therefore, Augustine concludes that "nothing other than God" is "higher than a rational and wise mind", suggesting that if there is anything higher than the rational thinking human being then it is God. (Williams