12. He said to him: We have explained THAT THEIR DEVOTION RISES to the endless world, since any bond, union or perfection secretly conceals that which is not to be comprehended or known, in which the desire of all desires lies. The endless world cannot be known, nor has it an end or beginning. It is not like "Ayin (lit. 'naught')," WHICH IS KETER CALLED 'AYIN,' the first to produce a head (lit. 'beginning') and an end (Heb. sof). What is the head? It is a supernal point, the head to all that is concealed, existing within thought. THIS IS CHOCHMAH CALLED 'BEGINNING.' CHOCHMAH EMANATES FROM KETER CALLED 'AYIN,' IN ACCORDANCE WITH THE SECRET OF THE VERSE: "BUT WHERE (LIT. FROM 'AIN') SHALL WISDOM BE FOUND?" (IYOV 28:12). It produced an end, MALCHUT, called "the end of the matter" (Kohelet 12:13). However, IN THE ENDLESS WORLD, there is no end.