/lit/ - Literature

I'm trying to understand Descartes’ ontological argument for the existence of God, can someone let me know if I'm kinda thinking about it the right way? So basically there are truths that we accept about the nature of things clearly such as "2+2=4", "water is wet", "triangles have 3 sides", and then in regards to God, "it is in the nature of God that he exists", or in other words, "God exists", and so therefore, God exists? Or you could rephrase it as "something that must exist, must exist" and so there must exist a thing that in its nature must exist, and we can call this necessary thing "God"? (and then going forward we can maybe extrapolate other properties of God from the base property of necessary existence?) I have no idea what I'm talking about so feel free to call me a retard.