akalpam evam vesam gata esa bhagavan atma-yogamayaya viracita-vividha-loka-yatra-gopiyayety arthah.
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The various forms of the Supreme Personality of Godhead, such as Narayana and Visnu, are beautifully decorated with different weapons. The Lord exhibits those forms to maintain all the varied planets created by His personal potency, yoga-maya.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
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, yoga-maya. After creating both the material world and spiritual world through yoga-maya, 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.