Purim was a breakthrough in exile. After the great miracles celebrated during this festival, the Persian rulers granted permission to rebuild the Second Holy Temple. We commemorate this freedom by serving G-d with unparalleled joy. During this period, the entire Jewish nation prays that this celebration will mark the beginning of the rebuilding of the Third Holy Temple.Based on Yerushalmi Megila, ch. 1, Law 5
From Time and Transcendence by Rabbi Faivish Dalfin
(L'Chaim)

"'L'Alter l'geula - Immediately to the Redemption' must be the purpose of our repentance and our prayers, of our hopes and deeds. All other hopes and deeds are illusory dreams... we must prepare heart and soul to greet our righteous redeemer... L'alter l'geula, be prepared for the imminent Redemption!"

From a public notice of the Previous Rebbe, published the eve of Rosh Chodesh Sivan, 5701-1941
(L'Chaim)

In the time to come, the Holy One, blessed be He, will bring the yetzer hara (evil inclination) and slay it in the presence of the righteous and the wicked. To the righteous it will have the appearance of a towering hill, and to the wicked it will have the appearance of a thread of hair... The wicked will weep saying, 'How is it that we were unable to conquer this thread of hair?'"(Talmud, Suka 52a)
(L'Chaim)

"In Nisan the Jews were first redeemed from exile. In Nisan in the future they will also be redeemed."(Talmud, Rosh Hashana 11a)
(L'Chaim)

If a king will arise from the House of David, who, like David his ancestor, delves deeply into the study of the Torah and engages in the mitzvot as prescribed by the Written Law and the Oral Law; if he will compel all of Israel to walk in [the way of the Torah] and repair the breaches [in its observance]; and if he will fight the wars of G-d; - we may, with assurance, consider him Moshiach.(Maimonides)
(L'Chaim)

The Baal Shem Tov established a custom to eat a third meal on the last day of Passover. This meal is known as "Moshiach's Meal," for on this day Moshiach's radiance is revealed. This revelation foreshadows the Redemption.

It takes place specifically on the last day of Passover, for this is a day which is added only in the Diaspora. The essence of the added day is that in the Diaspora and in the time of exile, the Jewish people transform 24 mundane hours into a day of holiness. On the last day of Passover this means transforming them into a festival of freedom and redemption. And this process of transformation is the essence of the imminent Redemption - converting the very exile itself into redemption, so that G-dliness is revealed even at the very lowest levels of creation.(Likutei Sichot)
(L'Chaim)

When Moshiach comes, a Jew will get up in the morning to get ready to pray - and his prayers will well forth spontaneously. Throughout the day, likewise, every spare moment will be utilized for the study of Torah and for the service of G-d. And everything will come so naturally and simply, without any effort.(Transmitted by oral tradition from an elder Chasid)
(L'Chaim)

"Fulfill for us, L-rd our G-d, the promise which You have made to us through Zefania Your prophet, as it is written, (Zefania 3:20): At that time, I will bring you back, and at that time I will gather you; for I will make you renowned and glorified among all the people of the earth, when I bring back your captivity before your eyes, said the L-rd.' "(From the morning prayers)
(L'Chaim)

Yehi Ratzon-May it be Your will, L-rd our G-d and G-d of our fathers, to have mercy on us and forgive all our sins, atone for us all our iniquities, and forgive and pardon all our transgressions. May the Beit Hamikdash be rebuilt, speedily in our days ...(From the morning prayers)
(L'Chaim)

"Yitgadal v'Yitkadash - Exalted and hallowed be His great Name throughout the world which He has created according to His will. May He establish His kingship, bring forth His Redemption and hasten the coming of His Moshiach in your lifetime and in your days, and in the lifetime of the entire House of Israel, speedily and soon, and say, Amen."(From Kaddish, said over a dozen times in the daily prayers.)
(L'Chaim)

T'ka B'Shofar Gadol-Sound the great shofar for our freedom; raise a banner to gather our exiles, and bring us together from the four corners of the earth into our land. Blessed are You G-d, Who gathers the dispersed of His people Israel.(The tenth of the 19 blessings said three times daily in the Amida)
(L'Chaim)

Return in mercy to Jerusalem Your city and dwell therein as You have promised; speedily establish therein the throne of David Your servant, and rebuild it, soon in our days, as an everlasting edifice. Blessed are You G-d, who rebuilds Jerusalem.(The 14th of the 19 prayers said 3 times daily in the Amida)
(L'Chaim)

The Talmud (Nida 61b) states that the mitzvot will be anulled in future time. This means that the mitzvot in their present form will be of no account relative to the revelations of the future. The degree of Divine energy elicited by the performance of a mitzva today is infinitely inferior to the degree of Divine energy that will be elicited by the performance of a mitzva in the future.(Hemshech 5672, vol. III)
(L'Chaim)

In the present, the Torah is garbed in narratives - the story of Laban [Jacob's father-in-law], the story of Bilam [the non-Jewish prophet], and the like. In the time to come, however, it will become apparent how these stories in fact speak of G-d, of the building of the supernal world.(Keter Shem Tov)
(L'Chaim)

"To recount Your benevolence in the morning and belief in You during the nights." (Psalm 92:3) The Maharal of Prague explains this verse from Psalms to mean that recounting G-d's benevolence in the "morning" of the Redemption comes about through belief in G-d and G-d's Redemption through Moshiach during the nights of exile.
(L'Chaim)

The appointment of Melech HaMoshiach (Moshiach, the King) has already taken place, as it is stated, "I found David My servant, with My holy oil I have anointed him" (Psalm 89). There now only needs to be the acceptance of his sovereignty by the people, and the connection of the king with his people, in an utmost revealed fashion - with the true and complete Redemption.(The Rebbe, Parshat Mishpatim, 5751)
(L'Chaim)

In the future time the Name of the Holy One, blessed be He, will be read as it is written, whereas now its pronunciation differs from it's spelling.(Talmud Pesachim 50a)
(L'Chaim)

On an obvious level, a fast day is undesirable. The suffering endured on a fast is surely not pleasurable, nor appreciated. Nevertheless, the inner dimension of a fast is good.

This concept is openly expressed in regard to the 17th of Tamuz. On an obvious level, it is associated with negative factors, the breaching of the wall of Jerusalem which led to the destruction of the Holy Temple. Nevertheless, its inner, essential quality is good.

This is even alluded to in the date itself, for 17 is numerically equivalent to the word "tov." This points to the intent of the exile, that it should lead the Jews to the Era of the Redemption.(The Rebbe, 17 Tamuz, 5751-1991)
(L'Chaim)

Rabbi Sholom Dov Ber of Lubavitch would say: "Many people await the coming of Moshiach and the 'better days' it will bring. In truth, however, these are the best days there are. What Moshiach will do is reveal the hidden goodness of our present-day existence."(Sefer HaSichot, 5704)
(L'Chaim)

"Concerning your second question, 'Has the time changed and is it permissible to act forcefully to bring about the ketz [the end of exile and the beginning of the Redemption]?' Yes. Times have changed and not only is it permissible, but it is obligatory to strongly demand of G-d to usher in our Redemption."(Rabbi Hillel of Kulmaya in his book of responsa, Avkat Rochail)
(L'Chaim)