I concluded that I was a substance whose whole essence or nature consists in thinking, and whose being does not depend on any place or any material thing.
Cogito ergo sum
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"The existence of God is clearly demonstrated by the very idea of God."
Controversial"I resolved to feign that all the perceptions I had ever received were no truer than the illusions of my dreams."
Shocking"The long chains of simple and easy reasonings by means of which geometers are accustomed to reach the conclusions of their most difficult demonstrations, had led me to imagine that all things, to the …"
Shocking"My purpose is not to teach a method which everyone ought to follow to guide his reason, but only to show how I have tried to guide mine."
Shocking"The mind is more easily known than the body."
Controversial