Arcana Coelestia #3234
3234. THE INTERNAL SENSE
Verse 1 And Abraham took another wife; and her name was Keturah.
'Abraham took another wife' means a further state which the Lord, whom Abraham represents, passed through - for 'Abraham and Sarah' represented the Lord as regards the Divine Celestial, 'Abraham and Keturah' the Lord as regards the Divine Spiritual, so that 'Abraham' here represents the Lord as regards Divine Spiritual Good, and his wife as regards Divine Truth allied to that Good. 'And her name was Keturah' means the essence of this Divine Truth.
Arcana Coelestia #1529
1529. It is very well known in heaven, but not so well known in the world of spirits, where so great a light comes from, namely from the Lord. And what is astonishing, the Lord appears to celestial angels in the third heaven as the Sun, but to spiritual angels as the Moon. There is no other source of light. But the intensity of the light angels experience depends on how celestial and spiritual they are, and the nature of the light depends on the nature of these qualities. Thus the Lord's celestial and spiritual itself shows itself before angels' external vision by means of the light.