Gaudapada’s Mandukya Karika commentary on the distinction between the 3rd quarter (Ishvara/Prajna) and the 4th quarter (Turiya/Atma)
In the Mandukya Karika, Acharya Gaudapada systematically maps out the transition from the causal realm (Prajna / Ishvara) to the ultimate, unconditioned reality (Turiya). His exposition in the Agama Prakarana (Chapter 1) provides one of the most rigorous dialectical separations in all of Advaita Vedanta between the 3rd Quarter (Prajna / Ishvara) and the 4th