But air and sky are immaterial, are immortal, are fluid, are indefinite. The essence of that which is immaterial, which is immortal, which is fluid, which is indefinite is the person in the disk of the sun, for he is the essence of tyad (the indefinite). So far with regard to the Devas.

In plain words: The wind and the sky have no fixed shape, do not die, and flow freely. The essence of these unseen things is the person inside the sun's disk. This is how it works in the world of nature and the gods.