"Dubito, ergo cogito, ergo sum.

(English: "I doubt, therefore I think, therefore I am")"

I doubt, therefore I think, therefore I am.

Cogito ergo sum. (I think, therefore I am.)

I am ... cogito ergo sum ... I think, therefore I am.

I think, therefore I doubt.

Ich denke also bin ich (cogit ergo sum)

Since I doubt, I think; since I think, I exist.

Descartes had his famous cogito ergo sum; but Thomas had added to it with his “Since I doubt, I think; since I think, I exist.” Well, I was certainly full of doubt. Doubt implied self-awareness, and a concern for one’s future. So I was a conscious entity, barring evidence to the contrary. One down.

I think I am, therefore, I am... I think.

And he arrives at the cogito ergo sum, which St. Augustine had already anticipated... "I think therefore I am," can only mean "I think, therefore I am a thinker"; this being of "I am," which is deduced from "I think," is merely a knowing; this being is a knowledge, but not life. And the primary reality is not that I think, but that I live, for those also live who do not think. Although this living may not be a real living. God! what contradictions when we seek to join in wedlock life and reason!

I think I am, therefore I am. I think.

If the ego cogito was built upon the foundations of the ego conquiro, the ‘I think, therefore I am’ presupposes two unacknowledged dimensions. Beneath the ‘I think’ we can read ‘others do not think’, and behind the ‘I am’ it is possible to locate the philosophical justification for the idea that ‘others are not’ or do not have being.

I am, therefore I think.

I think therefore I am