Until he knew

1. I wanted to ask, what do you think about David Hume's words that made it difficult for Descartes and most of the world to accept that even if we accept the claim that if you think, then you exist, the "self" (you think) that they are trying to conceptualize does not exist, because that person always sees an experience but does not see this "self," so why assume that it exists and, in other words, that there is an "I"?
2. And anyway, let's rock the ship of Theseus again. What makes the Qatar assume that the Mikhi of today is the Mikhi of when he was a child? Especially since he changed all his views and appearance, and to say, like Locke, that the continuity of consciousness explains a continuous identity is too big a leap. Especially since people sleep, so if consciousness stops for a moment, the person will be called a new person from his point of view, in the sense of new mornings. Great is your faith.
 
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Happy Purim