## A beginning

“We start from the null set $\emptyset$, from it we obtain the set $\{\emptyset\}$, from the two sets $\emptyset$ and $\{\emptyset\}$ we obtain the sets $\{\emptyset,\{\emptyset\}\}$ and $\{\{\emptyset\}\}$, and so on.” Azriel Levy, Basic Set Theory.

“Infinity is hard to comprehend” Steve Harris (Iron Maiden), Infinite Dreams (Seventh son of a seventh son).