Explore René Descartes' second Meditation on First Philosophy in this 23-minute lecture video. Delve into the philosopher's famous argument for his own existence, commonly known as "Cogito Ergo Sum" or "I think, therefore, I am." Examine Descartes' claim that he is a thinking being and his discussion on the nature of thought. Compare and contrast Descartes' view of the human mind with Aristotle's conception. Investigate the five functions of human beings according to Descartes and understand the differences between Cartesian and Aristotelian perspectives on imagination and sensory perception. Gain insights into Descartes' method of doubt and his approach to establishing certainty in knowledge.