God is a triangle

This week I have been reading the meditations by Descartes. Rene Descartes was a philosopher/mathematician during the 17th century. He wanted to prove that God exists, but many skeptics said how can you know anything, much less that God exists. From this doubt is born the popular phrase, "I think, therefore I am" or "Cogito, ergo sum". Descartes argues from the point of view of the skeptics that everything is unknown, but that we must at least concede that the act of thinking means my mind exists. Then he starts defining how we can know things with any degree of certainty. Once that is established he moves on to the existence of God.

I can think of a triangle, a closed shape with three sides and 180 degrees within. If I stop thinking about a triangle, the concept of a triangle does not cease to exist. It remains, which means it exists outside myself. Similarly I can think of God, a perfect being whose nature is perfect. If I cease to think about God, he does not cease to exist, and thus continues to exist outside my own thoughts. So God is a triangle, existent in and of themself.