Rebbe Nachman’s teachings in Likutei Moharan I:54 correspond to the Three Weeks, during which we mourn over the destruction of the Temple. The main purpose for a person coming into this world is to remember Olam Haba (the World to Come). This world is empty and meaningless, a passing shadow, a disappearing cloud. A person’s entire life is frustration and pain, and one gains nothing from all one’s efforts [in the material world]. A person has come into this world for nothing other than to be refined in this world for the eternal goal of Olam Haba. One must always remember this eternal goal, and constantly bind one’s thoughts to Olam Haba. But the evil eye is always trying to overpower the person, and one forgets [about Olam Haba], which is what caused the destruction of both the First Temple and the Second Temple.
For memory comes mainly from the k’dusha (holiness) of the Land of Israel, Jerusalem, and the Temple. The main revelation of G-dliness is there, and there more than anywhere else can one remind oneself of Olam Haba…
The memory is according to the person, the place, and the day. On any day, in any place, anyone in the world can always remember the World to Come, Olam Haba, if a person focuses one’s heart on it and does not fool oneself.
[Hashem set up within creation that the three dimensions of time, person, and place correspond with each other. For example, on the holiest day of the year (Yom Kippur), the holiest person (the high priest), would enter the holiest place (Holy of Holies).] Hence, the Temple is the root of holiness of the person, of place, and of time. The holiness of Jerusalem and the Land of Israel comes from there, and is drawn into all places, all people, and all days of the year.
A person will be able to remind oneself [of Olam Haba] every day, in all places, through which one returns [from shuv, to return, as in t’shuva, repentance] to G-d and does His will. Regarding the Temple, we read, “My eyes and heart will be there” (I Kings 9:3), corresponding to the eyes and heart. This corresponds to a “good eye,” which is the vitality of the heart, as opposed to the “evil eye,” which is the death of the heart, see LM I:54. Through correcting one’s eyes and heart, one is spared from forgetfulness.
However, the evil eye was very jealous of the greatness that the Jewish People possessed while in their Land and when the Temple was standing. Eventually it overpowered the people and cast them into forgetfulness of their ultimate goal and thus sinned. On account of forgetfulness, leading to sin, we were exiled from our Land, the Temple was destroyed, and continues to stand destroyed on account of our many sins, since we are unable to remind ourselves properly of Olam Haba (the World to Come) and l’shuv (to return) to G-d.
During these Three Weeks, may Hashem help us to begin to remember Olam Haba at all times and to remember our true purpose in coming down to this world, and may we all see the coming of the Final Redemption and of the Righteous Mashiach, and the rebuilding of our Final Temple, speedily, in our days! … Amen