When Muhammad (pbuh) contrasted the lesser jihad with the Greater Jihad, he was exposing the relationship that exists between the visible and the invisible as mankind realises their place in creation. He said that the lesser jihad was physical war and that the Greater Jihad was fought in the individual heart to seemingly fight against oneself to be a Human.
CG Jung called God “The Symbol of symbols”, and it seems that Muhammad knew that the outer always symbolises a greater inner.
Thus there is the lesser nativity and the Greater Nativity, the former symbolising a more potent latter for the individual.
The lesser nativity is the literal story of seeming impossibility that a Divine presence was miraculously born through biological means without the biological requirements for such a birth having been met, a story which has set the time recorder for the dominant culture of our era, it now being Christmas 2013AD.
The Greater Nativity (and by extension the Greater Easter also) is to internalise all of the characters in the outer nativity story, for oneself.
Mary in the right brain, Joseph in the left, the angel Gabriel the bridge, a catalyst between the two, all carried in the donkey of the body. The antagonist and protagonist elements in the literal nativity can similarly be identified inside an individual as a personal diction appears with Christ being simply Human, where before there was only a seemingly impossible potential for anyone ever becoming Human at all.
This being born again is mentioned here in the Sufi Way by Henry Bayman. (postscript added on 11/05/19)