'The wind is without body, the cloud, lightning, and thunder are without body (without hands, feet, &c.) Now as these, arising from this heavenly ether (space), appear in their own form, as soon as they have approached the highest light,

In plain words: Prajapati compares the Self to wind, clouds, lightning and thunder, which have no bodies. They rise from the sky and show their true form when they reach the highest light.