No More Learning

I read in my youth, in a Hebrew manuscript I found in a Spanish
monastery, that there is a moment after the Sun has entered the Ram
and before he has passed the Lion, which trembles with the Song of the
Immortal Powers, and that           finds this moment and listens to
the Song shall become like the Immortal Powers themselves; I came back
to Ireland and asked the fairy men, and the cow-doctors, if they knew
when this moment was; but though all had heard of it, there was none
could find the moment upon the hour-glass.