'Voice' signifies what is announced from the Word. 'Voice' often refers and is applied to things that cannot have a voice, as in Exodus 4, Nahum 3:2, Psalms 93:3-4.

A 'voice' signifies annunciation, and in a positive sense, annunciation from the Word, which is called 'the voice of Jehovah,' as is shown in Psalms 29:3-9 and Psalms 68:33, where 'voice' denotes divine truth, so the Word and annunciation from it.

'Voice' signifies the quality of interior things.

'Voice,' as in Revelation 19, signifies joy in worship, confession, and celebration of the Lord.

'A great voice heard in heaven,' as in Revelation 12:10, signifies the joy of the angels of heaven from the light and wisdom.

'A great voice,' as in Revelation 16:1, signifies the divine command.

'A great voice out of the temple of heaven,' as in Revelation 16:17, signifies a manifestation from the Lord out of the inmost of heaven.

'A great voice,' as in Revelation 21:3, signifies speech proceeding from love.

'One voice,' as in Revelation 9:13, signifies a divine command.

(Odkazy: Apocalypse Explained 16, 19; Arcana Coelestia 6971; Psalms 93, 93: 3-4)

20. To the seven churches, signifies to all who are in truths from good or in faith from charity. This is evident from the signification of "seven," as being all [persons]. For "seven," in the Word, signifies the beginning and end, thus an entire period and a full state, in like manner as a "week" (Arcana Coelestia 728, 6508, 9228); and because "seven" signifies what is full, it also signifies all, since all constitutes what is full, for fullness, as regards those that constitute a society (here, the church), means all; therefore when magnitude is treated of in the Word, "seven" signifies what is full; but when multitude is treated of, "seven" signifies all. "Three" also in the Word signifies what is full and all (as may be seen in Arcana Coelestia 2788[1-13], 4495, 7715); but "seven" is used in the Word where anything holy is treated of, and "three" in all other cases (Arcana Coelestia 10127); therefore "seven" is here used, because truths from good, which are the holy things of the church, are treated of. It is also evident from the signification of "churches" as being those who are in truths from good, or in faith from charity.

These are meant by "churches," because such truths constitute the church with everyone; for those who are not in truths from good, though born within the church, yet are not of the church, because there is no church in them. From this it is that the Lord's church consists of all those, wheresoever they are, who are a church, that is, who are in truths from good. (That the church, like heaven, is in man, and not outside of him, consequently that man who is in truths from good is a church, see Arcana Coelestia 3884; and in the work on Heaven and Hell 53, 54, 57.)

It is also said, who are in faith from charity, since this is similar; for truth is of faith, and good is of charity; for in fact, everything that man believes is called truth, and everything that man loves is called good.

(That every truth is from good, and that everything of faith is from charity, see in the small work, The New Jerusalem and its Heavenly Doctrine 84-107, 108-122; and Last Judgement (n. 33-39; also Heaven and Hell 364, 424, 482, 526.)

He who knows nothing of the internal sense of the Word, when he reads these things believes no otherwise than that by "seven churches" are meant the seven churches afterwards named (verse 1:11); whereas churches are not meant, but all who are of the church; because this is the spiritual sense of the Word.