http://ohr.edu/tw/5760/vayikra/emor.htmTHE ETERNAL FLAME"Command the Children of Israel ... to kindle a continual lamp." (24:2)
Go into any Synagogue when it's dark and you will see a small lamp shining above the Holy Ark. It's called the ner tamid -- the eternal flame.
That lamp is a mEmorial of the ner ma'aravi (western lamp) of the menorah which the kohanim lit in the Beit Hamikdash. The ner ma'aravi burned miraculously. It never went out. Every evening, when the kohen came to kindle the flames he would find the ner ma'aravi still alight from the previous evening. He would remove the still-burning wick and oil, clean out its receptacle and then put back the burning wick and the oil. Then he would kindle all the other lamps with the western lamp.
However, when the Romans destroyed the Beit Hamikdash it seemed that the little solitary flame had been put out forever.
In Rome, there stands a triumphal arch built by the Emperor Titus. One of its bas-reliefs depicts the menorah being carried through the streets of Rome as part of the booty pillaged from the Beit Hamikdash. All its lamps are dark. It looks like some expensive antique, soon to languish under the dust of ages in some Vatican vault.
But did Titus really extinguish that eternal flame?
The Beit Hamikdash is a macrocosm of the human body. If you look at a plan of the sanctuary in the Beit Hamikdash, you will notice that the placement of the various vessels -- the altar, the table, the menorah -- corresponds to the location of the vital organs in the human body. Each of the Temple's vessels represents a human organ.
The menorah corresponds to the heart.
Why is it that so many young people today are choosing to return to the beliefs and practices that their parents had forgotten, and their grandparents despaired of seeing continued? It is as though some mystical force is transmitted in the spiritual genes of every Jew. A light burning on the menorah of the Jewish heart across the millennia. A light which can never be extinguished, which burns miraculously, even without replenishment of the oil or wicks of mitzvah observance.
So, in a mystical sense, the light Titus tried to put out continues to burn in the menorah of the Jewish heart. But there's more.
It would come as a great disappointment to Titus, but the menorah that is collecting dust in the Vatican is not the original menorah. It is a copy. The original menorah was hidden away (together with the other vessels) in the caves and tunnels under the Temple Mount.
If while the Temple was standing the western lamp of the menorah burned miraculously without human assistance, so why shouldn't it go on burning even after it was buried?
That western lamp continues to "burn" under the Temple Mount throughout the long dark night of exile. It continues to "burn" to this day. And it will continue to "burn" until Mashiach comes. Then, the light of the menorah of the Jewish heart will be revealed as identical to the light of the menorah in the Holy Beit Hamikdash.
Sources:
Sfat Emet
Rabbi Akiva Tatz