174. As regards the atmospheres which are called ethers and airs, they are alike in both worlds, the spiritual and the natural, with the difference that those in the spiritual world are spiritual, and those in the natural world are natural. The former are spiritual because they come into existence from the Sun which is the first proceeding of the Lord's Divine Love and Wisdom, and from Him receive in them the Divine fire which is love, and the Divine light which is wisdom, carrying both down to the heavens where the angels are; and they cause the presence there of that Sun in things greatest and least. The spiritual atmospheres are discrete substances, or least forms, originating from the Sun. And because they receive the Sun singly therefore the Sun's fire, divided into so many substances and forms, and being as it were enveloped by them, and tempered by the envelopings, becomes heat adapted finally to the love of angels in heaven and of spirits under heaven. Similarly with the light of the Sun. In this the natural atmospheres are like the spiritual atmospheres, that they are also discrete substances and least forms, originating from the sun of the natural world. And these also receive the sun singly and store up its fire in themselves, and temper it, carrying it down as heat to the earth where men are. The same is true of the light.