In Genesis 4:22, 'Tubal-Cain, an instructor of every artificer in brass and iron,' as in Genesis 4:22, signifies the doctrine of natural good and truth. Tubal-Cain is called an instructor of every artificer, and not a father, like Jabal and Jubal, because celestial and spiritual, or internal things, did not exist before. This is why the term 'father' is applied in the case of Jabal and Jubal, the first existence of these internal things. As natural or external things existed before, but were now applied to internal things, Tubal-Cain is not called a father, but an instructor of the artificer. (Arcana Coelestia 421)

8823. 'And the voice of the trumpet grew louder and louder' means revelation in its general aspects, which comes through the angelic heaven. This is clear from the meaning of 'the voice of a trumpet' as celestial or angelic truth joined to the Divine, dealt with in 8815, and so revelation in its general aspects, since God's truth is revelation, and what is revealed by means of heaven is very general compared with God's truth itself in heaven (for it is outside or round about, 8815, and what is round about or outside is general compared with what is in the middle or inside); and from the meaning of 'growing louder and louder' as increasing, for just as a sound is inaudible on high, where the air is rarer, but grows and sounds louder as it comes down to lower levels, where the air is denser, so Divine Good and Divine Truth on highest levels are peaceful and altogether without any agitation; but as they pass down to lower levels they become by degrees less peaceful and at length violently agitated. These things are described in the following way by the Lord to Elijah when he was in Horeb, in the first Book of Kings,

Go out, and stand on the mountain before Jehovah. Behold, Jehovah was passing by, so that a great and strong wind was breaking apart the mountains, and shattering the rocks before Jehovah; Jehovah was not in the wind. Then after the wind, an earthquake; but Jehovah was not in the earthquake. After the earthquake, a fire; Jehovah was not in the fire. Finally after the fire, a slight whisper. ¹ 1 Kings 19:11-12.

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