PURPORT

In Bhagavad-gita (4.6) Lord Krsna says, sambhavamy atma-mayaya: "I appear by My internal potency." The word atma-maya refers to the Lord's personal potency, yogamaya. After creating both the material world and spiritual world through yogamaya, the Supreme Personality of Godhead personally maintains them by expanding Himself in different categories as the Visnu murtis and the demigods. He maintains the material creation from beginning to end, and He personally maintains the spiritual world.