Descartes famously doubted everything he thought he knew to arrive at something he could be certain of, leading to his conclusion "Cogito, ergo sum" ("I think, therefore I am").

Indeed, René Descartes’s philosophical journey led him to the profound realization: “Cogito, ergo sum.” This Latin phrase encapsulates the essence of his skepticism and self-awareness. By questioning everything, he found certainty in the act of thinking itself

So doubting is the starting point of everything

Totally agree on ‘I think therefore i am’
17 $DEGEN

In this profound statement, Descartes recognized that doubt was the starting point for true understanding.