Sauron lives?

[Leto]

Sauron can't come back. Despite the fact that the Silmariallin mentions that he suffers the same fate as Morgoth, imprisoned in the void until the end of days...he poured most of his power and being into the One Ring. The only reason he remained so powerful after his initial defeat at the last alliance was because the ring still existed and held all his power. Now the ring, which is effectively his 'form', is gone. His spirit has no more influence, and was blown away by the symbolic north wind, the power and will of Manwe. The only evil that exists is the evil that men carry with them, in their hearts. So there may always be another 'dark lord'. But none as powerful as Sauron...since he was the last of the order of the Maiar to refuse to return to Aman, after the end of the first age. During the fourth age, all the elves eventually leave the circles of the world as well...for it is the time of men...of mortals...as is the will of Eru.