  Some readers have thought that Descartes offers yet a third version of the ontological argument in this passage (Wilson, 1978, 174–76), but whether or not that was his intention is unimportant, since his primary aim, as indicated in the last line, is to enable his meditator to intuit that necessary existence is included in the idea of God. Since there is a conceptual link between the divine attributes, a clear and distinct perception of one provides a cognitive route to any of the others.