He states: "But it is clear... that existence cannot be separated from the essence of God any more than it can be separated from the essence of a triangle, that the three angles are equal. at two right angles, or that we could separate the idea of ​​valley from the idea of ​​mountain” (53) The attributes usually attributed to God are that he is omnipotent, omnipresent and omniscient. Descartes suggests that existence is one of God's attributes. Mersenne objects to this point by stating that: “[An] atheist knows clearly and distinctly that the three angles of a triangle are equal to two right angles. However, they are so far from supposing the existence of God that they openly deny it. » (78) After this "proof", the Meditator returns once again to the idea that God could not be a deceiver because of the clear and distinct rule. Descartes therefore claims that God justifies the memory of clear and distinct past perceptions - once again giving a circular view