Eicha begins: Eichah yashva badad - How She [Yerushalayim] sat alone. ALONE!
Why did we enjoy and rejoice in Yerushalayim? Because Yerushalayim connected us to the Source as the pasuk in tehillim says שמחתי באומרים לי וכו' ירושלים הבנויה כעיר שחוברה לה יחדיו I rejoiced when they told me .... Yerushalayim when built is the city that connects us to the Source. When Yerushalayim was destroyed we lost that connection. That is what the pasuk means when is says איכה היתה לזונה קריה נאמנה - How did She turn into a harlot that faithful city. The word "emuna" [kirya neemana] means "drawn after". When Yerushalayim was built we were "neeman", drawn after Hashem, but when we sinned we were unfaithful, we were no longer drawn after, which is metaphorically like a harlot who by connecting to everybody is connected to nobody.
A gematria! The gematria of Eicha is 36 which is the number of prohibitions for which one gets kares, excision, being cut off from G-d. "Eicha" means that as a community we were cut off. Eicha means "HOW CAN THIS BE?"
We are cut off. HOW CAN THIS BE?????
The tikkun of course is to reconnect. From churban to chibbur.
Bimheyra bi'yameinu!
[Sfas Emes Dvarim 1893]
TZVI MOSHE - HERE