8267. 'And song is Jah' means that the source of the whole of faith and of the glory resulting from it is Divine Truth which originates in Him. This is clear from the meaning of 'song', in reference to Jehovah, as an ascription of glory to the Lord, dealt with above in 8261. But when used in reference to man, as it is here, it means glory existing as a result of faith, and so faith from which glory results; for the whole of the glory which man has exists as a result of faith in the Lord, since faith which really is faith has its origin in the Lord, so that the Lord is within faith and consequently glory itself is also present. A further reason why man's glory is a result of faith is that Divine Truth, the source and conveyor of faith, appears before angels' eyes as light, and also as the brightness and radiance of light. This radiance, along with the magnificent scenes in heaven that are products of the light, is called the glory, which is accordingly nothing other than Divine Truth, and so nothing other than faith. This then explains why 'song', in reference to man, means glory resulting from faith.
 'Jah' means Divine Truth that emanates from the Lord's Divine Human. This is because Jah is derived from Jehovah, and the name Jah is used because it does not mean Being (Esse) but the Coming-into-Being arising from Being (Existere ex Esse); for Divine Truth is the Coming-into-Being (Existere), whereas Divine Good is Being (Esse), see 6880. This also is why the expression 'song is Jah' is used, for 'song' means faith that is a product of Divine Truth. 'Jah' again means Divine Truth in David,
Sing to God, praise His name; extol Him who rides on the clouds by His name Jah, and exult before Him. Ps 68:4.
Praising and extolling God 'by His name Jah' is doing so through Divine Truth. Again in the same author,
In distress I called on Jah; Jah answered me in a broad place. Jehovah helped me. My strength and song is lain. I shall not die, but live, and declare the works of Jah. I will enter through the gates of righteousness, and confess Jah. Ps 118:5, 13, 14, 17, 19.
Here 'Jah' is the Lord in respect of Divine Truth. Jah has the same meaning in the exclamation Hallelujah, at Ps 105:45; 106:1, 48; 111:1; 112:1; 113:1, 9; 115:17, 18; 116:19.