Arcana Coelestia #220
220. 'His voice going to and fro' means that only a residue of perception was left, so small as to be solitary and inaudible, so to speak. This is also clear from the next verse in which it is said that Jehovah called out to the man. A similar usage occurs in Isaiah,
The voice of one crying in the wilderness; the voice said, Cry! Isaiah 40:3, 6.
'Wilderness' stands for a Church where no faith exists; 'the voice of one crying stands for the declaration of the Lord's coming, in general for every declaration of His coming, as is made to regenerate persons who have this dictate residing in them.
Arcana Coelestia #3039
3039. 'He will send His angel before you' means Divine Providence. This is clear from the meaning of 'angel' in the Word as the Lord, though which aspect of the Lord it is appears from the train of thought, as dealt with in 1925. The aspect meant here is clearly Divine Providence. The reason why the Lord is meant in the Word by 'angels' is that everything spoken in the Word through the Prophets and all others, though dictated by angels, is received from the Lord, that is, it is the Lord's Own. Angels in heaven also acknowledge and perceive that nothing good or true originates in themselves but in the Lord; indeed so great is their acknowledgement and perception that they turn away from everything that suggests any other idea. This explains why 'angels', that is to say, good ones, are used to mean the Lord, though which aspect of the Lord it is appears from the train of thought.