NJHD 86, 89-90 - Who Is the Neighbor We Should Love? NJHD 104 - The Nature of Charity

NJHD 86

. . . so far as any one has the Lord with himself,
so far he is the neighbor . . ..

NJHD 89-90

. . . those who do not love themselves more than others,
as is the case with all
who belong to the kingdom of the Lord,
will derive the origin of neighbor from Him
whom they ought to love above all things,
consequently, from the Lord;
and they will esteem everyone as the neighbor
according to the quality of his love to Him
and from Him.
From these things it appears
from where the origin of neighbor is to be drawn
by the person of the church;
and that everyone is the neighbor
according to the good
which he possesses from the Lord,
thus good itself is the neighbor.

That this is the case, the Lord also teaches in Matthew:

For He said to those who were in good
that they had given Him to eat,
that they had given Him to drink,
that they had gathered Him,
had clothed Him,
had visited Him,
and had come to Him in prison;
and afterwards that,
so far as they had done it
to one of the least of their brethren,
they had done it unto Him. 
(Matthew 25:34-40)

In these six kinds of good,
understood in the spiritual sense,
are comprehended all the types of the neighbor.
. . . when good is loved
the Lord is loved,
for it is the Lord
from whom good is,
who is in good,
and who is good itself.

NJHD 104

Charity therefore is an internal affection,
from which a person wills to do good,
and this without remuneration;
the delight of his life consists in doing it.
With them who do good from internal affection,
there is charity in each thing
which they think and speak,
and which they will and do;
it may be said that a person and an angel,
as to his interiors,
is charity when good is his neighbor.
So widely does charity extend itself.