Descartes Meditation I - Of the things which may be brought into Doubt

Descartes Meditation II: Of the Nature of the Mind & that it is more easily known than the Body

Descartes Meditation III: Of God, That He Exists

Descartes Meditation IV: Of the True and the False

Descartes Meditation V: Of the essence of material things, and again, of God, that He exists.

Descartes Meditation VI: Of the existence of material things, & the distinction between mind & body