Apocalypse Revealed #644
644. 14:15 And another angel came out of the temple. This symbolizes the angelic heaven.
The symbolic meaning of an angel or angels may be seen in nos. 5, 65, 170, 258, 342, 343, 344, 415, 465 above. Here it is the angelic heaven, because we are told that the angel came out of the temple, and a temple symbolizes heaven in respect to the church (nos. 191, 529, 585). For the church exists in heaven just as much as on earth.
Plagues
'The plagues of Egypt' signify the falsities and lust which cause the church to perish.
In Revelation 16, 'the plagues were poured out upon men by angels from heaven' when they were truths and goods sent down by the Lord which were turned into evils and falsities by the people who were below. 'Plagues' signify evils of love, and falsities of faith.
(Referencat: Apocalypse Revealed 656)