Air" in the Bible represents thought, but in a very general way – our capacity to perceive ideas and the way we tend to think, rather than our specific ideas about specific things. We see the world around us through the air, and seeing corresponds to understanding. We hear through the air, and hearing corresponds to being taught and obeying. Birds fly in the air, and they represent specific thoughts and ideas. And breathing itself – taking in air and passing oxygen to the blood – represents our understanding of true spiritual ideas.

In Genesis 1:26, when used with fowls or birds of the air refers to the air we breathe, but sky, or heavens where are stars, and together these terms refer to both the spiritual and natural man, and to their food, or goods and truths. (Arcana Coelestia 57, 58)

In Genesis 3:8, the only Old Testament reference to air is in the phrase "cool of the day" (at the time of the evening breeze) which signifies the period when the church still had some spiritual perception. (Arcana Coelestia 221)

In Revelation 9:2; 16:17, air signifies the divine truth, darkened by infernal falsities. (Apocalypse Explained 541, Apocalypse Revealed 423)

In Revelation 16:17, everyone in the spiritual world breathes air according to his faith. (Apocalypse Revealed 708, Apocalypse Explained 1012, Apocalypse Revealed 708)

1974. As for the meaning of "evening and morning," in all phases of regeneration, both general and particular, the progression starts from evening, and tends toward morning. In general, the evening of those who are being regenerated is misery, temptations, despair, but they arrive at the morning. So also in detail, in all phases of regeneration one begins from evils, which are turned into good. And it is worth remembering that evil spirits begin, out of their own fantasies and passions, to arouse the person, but that these evils are turned into good in various ways. This has been revealed to me by experience lasting 3 years. So that is "evening and morning," and it applies to every least phase. Therefore it is the process not only of regeneration, but also of the perception of goodness. 1748, 16 May.