See, a description of revolutionary change, really the entrance to Olam Haba. Man will receive a longevity that may be difficult to conceive. It is a longevity that is predicated on a change of heart. The science of man can fix the errors in man, but it cannot bring him true happiness. It is written that there is "the tree of life, inside the garden." There is the place, inside the garden, which is pointed at by the Cheruvim, and by "the flaming sword that turns every way." The flaming sword "protects the way to the tree of Life," so as to prevent longevity without a change of heart, which would be a sure recipe for disaster. Know that the flame of the sword can only be identified clearly in darkness. Because, the main usefulness of a flame is in darkness.
Such is also the message of "your light has come." This is the light that was created in Bereshit 1:3, or the idea of light as in Torat Hasod. And "the darkness that shall cover the earth" is the total absence of this light among the nations: "and darkness was over the face of the deep (Bereshit 1:2)." The prophet speaks most clearly about non-physical darkness carrying non-physical light: "And thick darkness (shall cover) the peoples; but the Lord will arise upon you."
Who merits to identify the flame and who finds the tree, and also succeeds taking from it, he as it were awakens Hashem, the God of truth, in himself/herself: "but the Lord will arise upon you." True happiness shall be his/hers, and death does not force him/her. Such is the time after the redemption, when hatred of the other is no longer, when anti-Semitism has disappeared from the human heart. This is truly "the creation of new heavens and a new earth," when "we no longer speak of the former things," when "we shall bless ourselves by the God of truth."
When will it happen? הַקָּטֹן יִהְיֶה לָאֶלֶף, Moshiach ben Yosef will be until a thousand, that is, the big Aleph minus a little bit. The big Aleph is in 5796, in my calculations. The little bit was at first 7 years, but later it became 10 years. In its time, I will hasten it. On the other hand, a thousand minus one refers to the wars in the beginning of the State, the latest of which was the Yom Kippur war. In that war, וְהַצָּעִיר היה לְגוֹי עָצוּם, there were 600,000 men from age 20 to 60.