You searched for: “cogito
Cogito, ergo doleo.
I think, therefore I am depressed.

Also translated as, "I think, therefore I exist."

Credited to Descartes [French philosopher] as a priori proof of one's existence in his Discourse on Method, and is used as the starting point for his philosophic system.

Word Entries containing the term: “cogito
Cogito ergo sum. Deo gratias.
I think, therefore I am. Thanks be to God.

Motto of Shorter College, North Little Rock, Arkansas, USA.