sensory experiences are a result of external objects of material nature. Once these corporeal things (objects of a tangible, material nature) can be considered as self-evident ideas, they can no longer be products of the mind or God.
             Right in the beginning Descartes makes a very clear distinction between imagination intellectual thought. He states that intellectual thought is abstract and without shape, Descartes would call it extension, while imagination is perceived in pictures "the eyes of the mind" (mental viewing
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