V. The World Conceptions of the Modern Age of Thought Evolution

Descartes derives the further development of his world conception out of this root. In the “ego” he had attempted to seize existence. Whatever can justify its existence together with the ego may be considered truth. The ego finds in itself, innate to it, the idea of God. This idea presents itself to the ego as true, as distinct as the ego itself, but it is so sublime, so powerful, that the ego cannot have it through its own power. Therefore, it comes from transcendent reality to which it corresponds. Descartes believes in the reality of the external world, not because this external world presents itself as real, but because the ego must believe in itself and then subsequently in God, and because God must be thought as truthful. For it would be untrue of God to suggest a real external world to man if the latter did not exist.