Descartes tells how, disappointed by everything he learnt at school, he decided to start again from scratch. He sets himself four simple rules for thinking well, and doubts everything, until he finds the one thing he cannot doubt: “I think, therefore I am”.
A little book that changed the way we reason. Even today, it helps us think for ourselves, with method and a critical mind.
With the translation always in front of you, you can read this founding text in the language you are learning.



















