In Egyptian mythology,

Shu was the god of the Air, Wind, and Skies. The name Shu meant emptiness or he who rises up. The Greeks associated Shu With the Greek titan, Atlas, as both gods were assigned the duty of holding up the skies. Shu was predominately associated with fog, clouds, and the wind. According to some accounts, Shu plays a significant role in the creation of light and dark, good and evil. He separated Nut (sky goddess) and Geb (earth god), to formulate boundaries between the sky and earth. Without this division, physical life and growth wouldn’t have been possible on planet earth. Through this demarcation, a border was also established between the bright realm of living, and the dark world of the dead. As an illuminator of darkness, and a God of light, Shu Was closely associated with the sun God, Ra.