Arcana Coelestia # 2917
2917. 'I will bury my dead from before me' means that He would emerge and rise up out of the night prevailing among them. This is clear from the meaning of 'burying' as rising again, dealt with immediately above in 2916, and from the meaning of 'one who is dead' as a state when shadow or night, which is the lack of knowledge, has fallen, also dealt with above in 2908, 2912, from which the Lord emerges and rises again with man when He is acknowledged. Previously He is enveloped in night because He does not appear. He rises again with every person who is being regenerated.
Arcana Coelestia # 1854
1854. 'You will be buried at a good old age' means the enjoyment of all goods by those who are the Lord's. This is clear from the fact that people who die and are buried do not die but pass over from an obscure life into one that is bright. For death of the body is but a continuation and also a perfecting of life, when those who are the Lord's enter for the first time into the enjoyment of all goods. That enjoyment is meant by 'a good old age'. The expressions 'they died', 'were buried', and 'were gathered to their fathers' occur quite often, but they do not carry the same meaning in the internal sense as in the sense of the letter. In the internal sense it is the things which belong to life after death, and which are eternal, that are meant, whereas in the sense of the letter it is those which belong to life in the world and which are temporal.
[2] Consequently, when such expressions occur, those who see into the internal sense, as angels do, have no thoughts of such things as have to do with death and burial but with such as have to do with the continuation of life; for they look upon death as nothing else than a casting off of the things which belong to merely earthly matter and to time, and as the continuing of life proper. Indeed they do not know what death is, for death does not enter into any of their thinking. It is the same with people's ages. By the phrase used here, 'at a good old age', angels have no perception at all of old age; indeed they do not know what old age is, for they themselves are constantly moving towards the life of youth and early manhood. It is life such as this, consequently the celestial and spiritual things belonging to it, that are meant when the expression 'a good old age' and others like it occur in the Word.