We can see from this what the Lord’s presence is like in the heavens: it is everywhere, with every individual in the good and true qualities that emanate from the Lord. So he is in angels in what is actually his own (as noted in Section 12).
Their sense of the Lord’s presence is in their deeper reaches. It is from these that their eyes see, so he seems to be outside them because there is a continuum. This enables us to see how we should understand the Lord’s being in them and their being in the Lord, according to the Lord’s words,
Abide in me, and I in you (John 15:4), and Those who eat my flesh and drink my blood abide in me and I in them. (John 6:56)
“The Lord’s flesh” means what is divine and good, and his “blood” means what is divine and true.
from Heaven and Hell, Section 147