Then there is the problem of how it can be possible for a finite mind to have a clear and distinct idea of an infinite God. Descartes was challenged on this and in the first set of Replies says, "the infinite, qua infinite, can in no way be grasped. But it can still be understood, in so far as we can clearly and distinctly understand that something is such that no limitations can be found in it, and this amounts to understanding clearly that it is infinite."
Then there is the issue of how a finite intellect can have a clear and distinct concept of an endless God. Descartes was confronted with this challenge, and in his initial set of Responses, he argued that "the infinite, as such, cannot be conceived. Nevertheless, it may still be understood, insofar as we can clearly and distinctly comprehend that something exists without any bounds or limits, which amounts to understanding clearly that it is infinite."