Philosophy is unlike any other subject studied today. Philosophy is not based on scientific facts or observations, and it is not rooted in religious scripture either. Philosophy is made up of many arguments that date back thousands of years ago. One of the most intriguing arguments philosophers face, is the existence of God, also known as the cosmological argument. The cosmological argument is the argument that the existence of the world or universe is strong evidence for the existence of God who created it. This type of philosophical arguments allows us to question the universe and where we stand in it. It also makes us question the possibilities we have here on Earth, as well as what we are capable of learning and knowing about it. There are various arguments on the existence of God, however none of them make a conclusive case for the existence of God. Most of the arguments actually are very controversial and problematic. Kalam's Cosmological Argument dates back to Arabic philosophy. The Arabic word Kalam means "speech," or Islamic scholastic theology. Either way you define it, Kalam basically means "natural theology" or "philosophical theism". The most distinguishing characteristic of Kalams cosmological argument, is its emphasis on the improbability of the actual infinite. Kalams argument tries to validate that the existence of an actual infinite is unlikely, and that even if it were likely, the universe itself is not truly infinite and therefore must have had a beginning. Kalams cosmological argument claims that, everything that has a beginning of its existence has a cause of its existence. The universe has a beginning of its existence, so that means the universe has a cause of its existence. Furthermore, if the universe has a cause of existence, then that cause is God. Therefore, God exists. Thomas Aquinas's was a priest, theologian, and philosopher. He is known to be the greatest Christian philosophers to have ever lived. He studied the work