René Descartes Once upon a time we were told that the earth was the center of the universe. The sun, moon and all planets, even unknown ones, all revolved around our planet. Now we look at that statement and wonder in amazement how our species could have pondered such a thought. Through advanced mathematics and persistent work to prove his theory, René Descartes transformed yet another of these worldly assumptions and proved it all wrong. René Descartes' Method of Doubt was simply his mathematical method for discovering unanswered questions about the universe. He wanted to prove every unknown matter and be sure that he could prove his truths with the knowledge given only by mathematical proof. “Common sense,” which Descartes calls natural reason, is the understanding of all human beings with many given subjects. He believes that in some areas of common sense, one should be expected to know what all humans are presumed to know and therefore need not be proven mathematically. Faced with René Descartes's extreme doubt, he found that he hoped to use skepticism to find absolute certainty. When doubting something, Descartes would begin by asking whether it is rationally possible to doubt everything. As you do this, you will find out if there is any indisputable truth. Instead of trying to examine every belief that Descartes holds, Descartes examines the origins of different types of beliefs. In this way, he rejects any idea that might be wrong, and he will reject it immediately. The importance of René Descartes' vision of philosophy is the simple fact that it was completely focused on proof. He needed proof to believe in something, and he found the proof through a truth, which is acquired in knowledge. His knowledge was then acquired mathematically. His importance was not just in proving ideas through mathematics, but in proving the existence of God. He sought to build a reliable basis for knowledge with the idea of ​​God. As Descartes states, “If God is omniscient, all good and omnipotent, he would not let us live in constant ignorance." It gives other individuals incentives to find the truth, even if they believe the basis for finding a truth is impossible. Descartes uses methodical doubt as a form of excluding all obstacles of ideas that could even remotely be false.