Since all that derives its vitality from the three wholly unclean kelipot cannot rise to holiness, only the observance of all the 365 prohibitions allows the entire vital soul to ascend without any part of it held back by the impurity of these kelipot. But whereas the revelation at Sinai lasted only a short time, the revelation in the future will be permanent. Kelipat nogah, containing both good and evil, is the medium through which these kelipot which are completely evil receive their vitality from G-dliness, which is completely good. When kelipat nogah ascends to G-dliness, the impure kelipot, no longer having any access to G-dly vitality, cease to exist.