Ananda māyakosha, experientially, what are we talking about? Our deep sleep experience. All our causal bodies together comprise the causal body of Ishwara called māya. So higher than the cosmic mind is abhāt or māya and you are the consciousness which illuminates it.
Swami Sarvapriyananda teaches the Katha Upanishad, one of India's most revered texts which is also a part of the Vedas. It is a collection of philosophical poems representing a conversation between the sage Naciketas and Yama (god of death). They discuss the nature of Atman, Brahman and Moksha(liberation).