Musar zu Jeschijahu 65:17

Know that the world to come is the place of the souls of the righteous, and their nearness to the Creator is according to their virtue. But the soul of the wicked does not go forth from this world until it has been punished and cleansed; then it can easily ascend to its place, when God wills it. As for the souls that ascend to the world to come, their work is the work of the angels, at the time that they separate from the body until the Creator wishes to restore them to their bodies as at first. That will be at the time of the resurrection of the dead, when He decrees that some of them may return to their bodies. Then this world will be renewed because of its people being renewed, and on this theme the prophet said (Isaiah 65:17), “For, behold, I create new heavens and a new earth.” And it is possible that after the Creator renews the bodies after they have separated and decayed, and the souls after they have ascended, there will likewise be renewed in the heavens a power which the heavens do not now possess. So will He renew in the earth another power. Just as a king does when he wishes to make a great feast for those who love him. He commands that the house be made empty for them and that everything that is in the house be removed in order to renew it, to plaster it, and to place therein delightful objects in honor of his allies who are coming to his feast. This world which He will renew at the time of the resurrection is also called the world to come. There will stand the pious ones and holy ones of God, each because of his desire to stand and to serve Him and to praise His Name and to learn new and holy wisdoms, like the wisdoms of the prophecies and things similar to it. They will neither eat nor drink, just as Enoch and Elijah stood before Him without food or drink, and like Moses, our Teacher, of blessed memory, who stood before Him for forty days without eating or drinking. For food and drink are a bad mixture in the body, and it is impossible that a man should be in the utmost degree of piety and holiness when he is still eating and drinking. For it is not a matter of eating and drinking alone, but that men are drawn by them to other and evil pleasures and sweet delights, enjoyments, and flatteries. But when eating and drinkings are removed, then all these wicked deeds are also removed, and therefore Scripture says (Ezekiel 36:27), “And I will put My spirit within you.”