Whether he was born in 4 B.C. or A.D. 6, in Bethlehem or Nazareth, whether there were multitudes of the heavenly host to hymn the glory of it or just Mary and her husband–when the child was born, the whole course of human history was changed. That is a truth as unassailable as any truth. Art, music, literature, Western culture itself with all its institutions and Western man’s whole understanding of himself and his world–it is impossible to conceive how differently things would have turned out if that birth had not happened whenever, wherever, however it did. And there is a truth beyond that: for millions of people who have believed since, the birth of Jesus made possible not just a new way of understanding life but a new way of living it

Frederick Buechner in Listening to Your Life. Christianity Today, Vol. 37, no. 15