Explanation of Numbers 18:19
By Henry MacLagan
Verse 19. In one word, all illustration in worship which the man of the Spiritual Church receives from the Lord must be ascribed to Him, even as to every perception of truth, and every delight in good, and this perpetually through the celestial heavens; for thereby is the reciprocal conjunction of good with truth and of truth with good between the celestial and spiritual man to eternity.
Arcana Coelestia #9388
9388. 'And built an altar under the mountain' means a representative sign of the Lord's Divine Human in respect of Divine Good from Him. This is clear from the meaning of 'an altar' as a representative sign of the Lord's Divine Human, dealt with in 921, 2777, 2811, 4489, and therefore the chief representative of worship of the Lord, 4541, 8935, 8940; and from the meaning of 'the mountain' as the good of love, dealt with in 4210, 6435, 8327, 8658, 8758, in this instance the Divine Good of love which emanates from the Lord, since it was Mount Sinai, where the Lord was then. 'Mount Sinai' means Divine Good united to Divine Truth emanating from the Lord, see 8805.