Brass
Brass and iron as in Isaiah 48:4 and Daniel 7:19 signify what is hard.
In Genesis 4:22, brass signifies natural good. (Arcana Coelestia 421)
In Numbers 21:9, this signifies the Lord's divine natural. (Apocalypse Revealed 49)
Brass also signifies the good in man's natural and the sensuous in the Lord. (Arcana Coelestia 197, Apocalypse Revealed 49, Apocalypse Explained 705)
(Odkazy: Apocalypse Explained 70)
Arcana Coelestia # 3068
3068. 'Let down now your pitcher' means submitting facts. This becomes clear from the meaning of 'letting down' as submitting, and from the meaning of 'a pitcher' as facts. The reason why a water-pot or a pitcher means facts is that 'water' means truth, 680, 739, 2702, and a pitcher is a vessel with water in it, even as factual knowledge is a vessel with truth in it. All factual knowledge is a vessel for truth, and all truth is a vessel for good. Factual knowledge without truth is an empty vessel, and so is truth without good; but factual knowledge in which truth is held is a vessel that is filled, as is truth in which good is held. Affection which is an attribute of love is what joins them together so that they may exist in order. For love is spiritual conjunction.