Morning comes with the rising of the sun, and the sun -- which gives life to the earth with its warmth and light -- represents the Lord in His divinity, bringing spiritual life through love and wisdom. Thus, the morning represents the coming of the Lord into our lives, and all the things that flow from it: the love, joy and enlightenment He brings; the peace and tranquility of passing the spiritual obscurity of night; the anticipation of the learning and usefulness of a new day; and the awareness of The Lord's renewed presence.

(Reference: Apocalypse Explained 179; Apocalypse Revealed 151; Arcana Coelestia 2333 [1-3], 2540, 2780, 5740, 8211, 8812, 10134, 10200, 10413; True Christian Religion 764 [1-2])