AE 36

. . . "clouds" signify Divine truths in ultimates . . .
for when Divine truth proceeding from the Lord,
which is the very light of heaven,
passes through the angels,
it appears as a cloud,
purer or denser according to their intelligence.
. . . this is why "clouds,"
such as those that appear
before the eyes of men in the world,
signify Divine truth in ultimates;
and as the Word in the letter
is Divine truth in ultimates,
that is what is meant by "clouds."

AE 48 [2, 3]

. . . "kingdom" in the Word
signifies heaven and the church in respect to truths . . ..

. . . "kingdom" in the Lord's prayer:

Thy kingdom come.
Thy will be done,
as in heaven, so also upon the earth.
Thine is the kingdom, and the power, and the glory.
(Matthew 6:10, 13)

"Thy kingdom come"
is a prayer that truth may be received;
"Thy will be done,"
that it may be received by those who do God's will;
"Thine is the kingdom, and the power, and the glory,"
means Divine truth from God alone;
it is also said "power and glory,"
because Divine truth has all power and glory.
From all this it can be seen what
"the kingdom of God" signifies
in very many passages in the Word,
namely, the church in respect to truths,
and also heaven,
and in the highest sense the Lord
in respect to the Divine Human.
"Kingdom," in the highest sense,
signifies the Lord in respect to the Divine Human,
because from Him all Divine truth proceeds;
and "kingdom" signifies heaven,
because heaven with the angels
is from no other source than from the Divine truth
that proceeds from the Lord's Divine Human.