“The whole force of the argument rests on the fact that I recognize that it would be impossible for me to exist, being of such a
nature as I am (namely, having in me the idea of God), unless God did
in fact exist. God, I say, that same being the idea of whom is in me: a
being having all those perfections that I cannot comprehend, but can
somehow touch with my thought, and a being subject to no defects
whatever. From these considerations it is quite obvious that he cannot be
a deceiver, for it is manifest by the light of nature that all fraud and
deception depend on some defect”