I think; therefore I am.

Summary

This quote, coined by philosopher René Descartes, asserts that the very act of thinking confirms one's existence. Descartes argued that doubt was a powerful force that could be used to question all beliefs and knowledge. However, he found that he could not doubt his own existence. In essence, this quote reflects Descartes' conclusion that the capacity to think signifies the existence of a thinking being, thus affirming one's own existence. It highlights the inseparable relationship between consciousness and existence.