Transition from Doubt to Knowledge and Comprehension of the Mind itself in Descartes’ Philosophy

Descartes uses skepticism as a method in seeking the truth and afterwards he arrives at the knowledge of truth by conception cogito which is an intuitive proposition. Comprehension of the mind itself is asserted from which ego cannot be cut from thinking, and this conception is based on the existence of God which does exist to be contained in the mind conceptually. God is stated the most perfect being which does rescue from doubt and show its real being it.