The senses alone are not sufficient to give us a clear and distinct knowledge of things.
Cogito ergo sum
Meditations on First Philosophy, Meditation I
1641
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"I believe that all my dreams are illusions."
Controversial"The first precept was never to accept a thing as true until I knew it as such without a single doubt."
Controversial"I concluded that I was a substance whose whole essence or nature consists only in thinking, and that, in order to exist, it needs no place and depends on no material thing."
Shocking"It is a mark of a truly great mind to be able to make a great discovery with few means."
Strange & Unusual"Except our own thoughts, there is nothing absolutely in our power."
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