Yes. That's pretty much Descartes.One exists before one thinks. By thinking, one becomes aware of oneself as separate from what one thinks about.
*John Oliver voice*More accurately then:
"I think, therefore I am not".
"I am, until I think".
"I think, therefore I no longer am".
A human is screwed as soon as he starts to think. Only by backtracking, undoing all thought, can he once again exist.
And only then, if he is exceedingly skilled, and also exceedingly lucky.
What just happened there? Thinking has nothing to do with "is or is not," because "is or is not" is thought. "Undoing all thought" is thought! "I exist" is thought!
I dare you to express anything that isn't thought!
Oh wait...