So, I don’t remember a lot of details about this rabbi. I just remember one time I was listening to rab Galed and he told us that this man was an old man who didn’t live in his life as a jewish person (in a religious way).
Still, one day, suddenly after he waked up, he became a Torah genius. I think he also knew a lot of the Talmud and oral Torah. I think he even wrote a lot of books, like 20, in just 2 years.
Well, that’s everything I remember. Sorry if I changed it, is just the way I remember this.