Our Sages have said that there is no difference between This World and the Days of the Messiah except (our) subservience to the kingdoms of the world alone. From the plain meaning of the words of the prophets we understand that at the beginning of the days of the Messiah there will be the War of Gog and Magog. Before the War of Gog and Magog, a prophet will arise to correct Israel and prepare their hearts, as it says, “Behold, I will send you Elijah” (Malachi 3:23). He will not come to make the pure impure, nor purify the impure, nor disqualify people who are presumed to have legitimate lineage, nor qualify those who are disqualified. He will only come to bring peace to the world, as it says, “And he shall turn the hearts of the fathers on the children” (Malachi 3:24)…
…neither the order that these events will occur nor their details are fundamental to the religion. Thus, a person must never busy himself with the Aggadoth and not dwell on the Midrashim regarding these matters or similar issues. He must not make them dogma. For these do not result in either love (for G-d) nor fear (of sin). Similarly, one should not calculate the Ends. Our Sages have said that the spirit of those who calculate the Ends will expire. Rather, one is to (simply) wait and believe in the principle of this matter, as we have explained…
The Sages and the Prophets did not long for the days of the Messiah because they wanted to rule the world or because they wanted to have dominion over the non-Jews or because they wanted the nations to exalt them or because they wanted to eat, drink and be merry. Rather, they desired this so that they would have time for Torah and its Wisdom. And there would be no one who would oppress them or force them to be idle (from Torah). This, in order that they may merit the World to Come, as we have explained regarding the Laws of Repentance.
At that time there will be no famines and no wars, no envy and no competition. For the Good will be very pervasive. All the delicacies will be as readily available as is dust. The world will only be engaged in knowing G-d. Then, there will be very wise people who will understand the deep, sealed matters. They will then achieve knowledge of the Creator to as high a degree as humanly possible, as it says, “For the Earth shall be filled of knowledge of the Lord, as the waters cover the sea” (Isaiah 11:9).