Arcana Coelestia #860
860. From these considerations it also becomes clear that all regeneration advances from evening to morning, as is mentioned six times in Genesis 1 where the regeneration of man is the subject. Here the evening is described in verses 2-3, the morning in verses 4-5. The present verse describes the first ray of light or the morning of this state as 'the tops of the mountains appearing'.
Book
In Revelation 10:9, "And I went unto the angel, saying, give me the little book," signifies the faculty of perceiving the quality of the Word from the Lord.
In Psalm 40:7, this signifies the Word. (Apocalypse Explained 299, Coronis 60)
(References: Apocalypse Explained 616)