I Doubt, Therefore I Am

What Descartes really said.

Like many others, I always thought that famous quote from Rene Descartes — I think, therefore I am — told the whole story.

Turns out, it doesn’t. Admittedly, that’s according to something I recently came across on Instagram or X. And who says, social media is worthless?!

Apparently, here’s what the 17th-century French philosopher, mathematician, and scientist, often called the father of modern philosophy, actually said:

"Dubito, ergo sum, vel, quod idem est, cogito, ergo sum."

I’m told that translates to:

"I doubt, therefore I am—or what is the same—I think, therefore I am."

Puts a different flavor on the oft-repeated quote, doesn’t it?

Another Kind of Doubt

In prior blog posts, I connected by new novel, Doubting Nikki — A Tale of Faith and Delusion, with C.S.Lewis and with Saint Gemma Galgani.

This recently (for me, anyway) uncovered twist on the Descartes quote lets me tie in once more with Doubting Nikki.

Throughout the psychological thriller, Nikki and her husband Cami descend down rabbit hole of conspiracy theories where doubt provides more certainty than questionable reality.

Please check it out on Amazon in ebook, audiobook or paperback!

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Matthew Galgani
matt@mathewgalgani.com

© 2026 Matthew Galgani. All rights reserved.

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