Recall that the exile is the consequence of a sort of cosmic "disconnect".
And as a consequence of it, the highest reaches of G-dliness became
disconnected from the lower ones, and there came to be a breakdown in the
workings of the magnificent and teeming cosmic waterfall that is the
source of all life, power, and sustenance.
And while there'd been an orderly, elegant, rhythmic, and broad rush of
water downward along the steps of this waterfall, the interlacing steps
suddenly went off-kilter in the course of the exile as they started to
disconnect. And the water began to plummet down chaotically. But what had
been disconnected and had run amok in the exile will be reconnected and
set in order in the course of the great redemption.
So we're told here that after the Shechina will have arisen from the dust
in the previous stage of The Visitation, there'll come a point
when "Chochma's light" will begin to flow downward, without which nothing
more could be done.
Now, recall that Chochma is a very exalted level of illumination; in fact,
it's the second highest of the ten, as we indicated. Thus the downpouring
of its light will be a very significant event.
But the flow of Chochma's light is likened to a slow, unctuous drip of
myrrh (an exotic aromatic gum resin). Thus it will descend slowly, but it
will eventually and surely touch upon the sephira of Yesod, which is the
next-to-last one and is related to the coming of the Moshiach. And that
will allow for the next stage.