The concept of Maya appears in numerous Upanishads. The verses 4.9 to 4.10 of Svetasvatara Upanishad, is the oldest explicit occurrence of the idea that Brahman (Supreme Soul) is the hidden reality, nature is magic, Brahman is the magician, human beings are infatuated with the magic and thus they create bondage to illusions and delusions, and for freedom and liberation one must seek true insights and correct knowledge of the principles behind the hidden magic. Gaudapada in his Karika on Mandukya Upanishad explains the interplay of Atman and Maya as follows,