The argument that material objects exist . God is no deceiver. He created me and gave me reason which tells me that my ideas come from external corporeal things. If they do not come from external objects, then God must be a deceiver. But this is an absurdity.
Material objects exist.
Having put our scientific knowledge on a firm foundation and having shown that it comes from our mind, not our senses, Descartes needs to show how this new type of knowledge is compatible with religion. He has done this, partially by showing how it leads to knowledge of the existence of God. He still has to reconcile the seeming incompatibility in the objective and subjective views we can take of ourselves. The argument for the distinction of mind and body . Descartes shows two ways in which mind and body seem to have different properties, and how, hence, they must be different things.