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'.
Arcana Coelestia #881
881. 'Seven' means that which is holy because now charity is the subject. This is clear from the meaning of the number seven, dealt with already in 395, 716. Furthermore 'seven' has been brought in here so that all things may be linked together as though they were historical events, for in the internal sense 'seven' and 'seven days' contribute nothing more to the meaning than a certain holiness which this second state possesses from what is celestial, that is, from charity.