reference: Sri Aurobindo and the Mother, Our Many Selves: Practical Yogic Psychology, Chapter 2, Planes and Parts of the Being, pp. 72-73 This episode is also available as a blog post at https://sriaurobindostudies.wordpress.com/2023/09/10/higher-mind-is-the-first-gradation-of-consciousness-beyond-the-normal-human-mental-level/