On the night of 10 November 1619, René Descartes experienced a series of vivid, transformative dreams that would alter the trajectory of Western philosophy.
These visions, occurring during a time when he had sequestered himself to contemplate profound questions, led him to explore the nature of knowledge, doubt, and existence.
The clarity and depth of these dreams inspired Descartes to formulate the foundational ideas of what would later become his seminal work, "Meditations on First Philosophy", laying the groundwork for modern rationalism and introducing his famous dictum, "Cogito, ergo sum" — "I think, therefore I am."