AC 5331 - Just what is the celestial of the spiritual?

AC 5331
. . . the celestial of the spiritual
is the good of truth in which is the Divine,
or which is immediately from the Divine.
. . . the celestial of the spiritual in which is the Divine,
belonged to the Lord alone when He was in the world,
and was the Human in which the Divine Itself could be,
and which could be put off
when the Lord made all the Human in Himself Divine.