W.B.Yeats "The needle's eye"

All the stream that's roaring by

Came out of a needle's eye;

Things unborn, things that are gone,

From needle's eye still goad it on.

In the Gospel it is through the needle's eye that a man enters the Kingdom of Heaven. 

Matthew, Chapter 19, verse 24

24 Again I say to you, it is easier for a camel to go through the eye of a needle, than for a rich man to enter the kingdom of God.”

The image suggests also the narrow entrance of womb and passage-grave, the dimensionless punctum through which life comes and goes. Above all, the needle's eye is apt to receive the thread of destiny spun by the Fates that runs on "Plato's spindle"  from birth to death (The Republic  Book X):  

"The spindle turns on the knees of Necessity; and on the upper surface of each circle is a siren, who goes round with them, hymning a single tone or note. The eight together form one harmony; and round about, at equal intervals, there is another band, three in number,each sitting upon her throne: these are the Fates, daughters of Necessity, who are clothed in white robes and have chaplets upon their heads, Lachesis and Clotho and Atropos, who accompany with their voices the harmony of the sirens --Lachesis singing of the past, Clotho of the present, Atropos of the future..."

Or, in the "dreaming  back", when "time is unwound" from death to birth...

Nota Bene:
To goad = to drive with or as if with a goad; spur; incite