I think, therefore I am.

Je pense, donc je suis.

René Descartes

Philosophers

René Descartes

French philosopher-mathematician born in 1596 who launched modern thought with "I think, therefore I am." His methodical doubt rebuilt knowledge on certainty, while his coordinate system fused geometry and algebra.

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Source: 方法序説 第四部 (Discours de la methode, 1637)Verified

René Descartes's Other Quotes

I think, therefore I am.

Good sense is the most evenly distributed thing in the world.

Once in one's life, everything should be called into doubt.

Divide each difficulty into as many parts as possible for a better solution.

Related Quotes

For Being is, and non-Being is not.

-- Parmenides

All things flow.

-- Heraclitus

For whom emptiness works, everything works. For whom emptiness does not work, nothing works.

-- Nagarjuna

I think, therefore I am.

-- René Descartes

Being determines consciousness.

-- Karl Marx

The world is everything that is the case.

-- Ludwig Wittgenstein