René Descartes: 4 ideas worth knowing

4 ideas from René Descartes, each explained in a minute and credited to the original work. Free on Savvy.

A philosopher doubted literally everything to find one thing he couldn't doubt
René Descartes imagined an all-powerful demon deceiving him about everything: the outside world, his own body, even basic arithmetic. Stripping away every belief that could possibl…
— René Descartes, Meditations on First Philosophy
Descartes tried to doubt everything, and found one thing he couldn't
Trying to build knowledge on unshakeable foundations, Descartes doubted his senses, his body, even mathematics, imagining an evil demon deceiving him about all of it. But the very …
— René Descartes, Meditations on First Philosophy
Descartes thought the soul plugs into the body through a single pea-sized gland
Convinced that mind and body were fundamentally different substances, Descartes still needed to explain how they interact. He proposed the pineal gland — the only brain structure h…
— René Descartes, The Passions of the Soul
A candle melts beyond recognition, yet Descartes says you still know it's the same wax
Every sensible quality of a piece of wax — its shape, smell, hardness, sound — changes completely once it melts near a flame, yet you're certain it's still the same wax. Descartes …
— René Descartes, Meditations on First Philosophy

Five ideas worth knowing, every week