The Parable of the Passing Bird
One cold winter night, Socrates was invited to the home of one of his disciples. After dinner, the guests gathered around the great philosopher to hear what he would say. Just as the room grew silent, a bird flew in one window and quickly passed out another.
"So too is the life of man. He comes from darkness and to darkness he must return, enjoying only briefly the light and warmth"
-Modified from a passage in Ivan Turgenev's novel "Rudin"
I have heard the same story attributed to saint Collumba, it just shows you how easy it is to plagiarize, and how much of Christianity may be borrowed. I really like the photo.
Dark to dark doesn't sound like the Christian myth though.
@CallMeDave No, if I remember, it was said to the king as a first shot intending to belittle this life, and then of course build up the future one that the confidence trickster was trying to sell.