Who is she that looketh forth as the morning, fair as the moon, clear as the sun, and terrible as an army with banners?
Who is she that looketh forth - expressing the admiration of the daughters. Historically, Acts 5:24-39.
As the morning - as yet she is not come to the fullness of her light (Proverbs 4:18).
Moon - shining in the night, by light borrowed from the sun: so the bride, in the darkness of this world, reflects the light of the Sun of righteousness (2 Corinthians 3:18).
Sun. Her light of justification is perfect for it is His (1 John 4:17). The moon has less light, and has only one half illuminated: so the bride's sanctification is as yet imperfect. Her future glory (Matthew 13:43): she "shall shine forth as the sun."
Terrible as an army. The climax requires this to be applied to the starry and angelic hosts, from which God is called Lord of Sabaoth. Her final glory (Daniel 12:3; Revelation 12:1). The Church Patriarchal answers to "the morning;" the Levitical to "the moon;" the Evangelical to "the sun;" the Church Triumphant to "the bannered army."