reference:
Sri Aurobindo and the Mother, Our Many Selves: Practical Yogic Psychology, Introduction, Sri Aurobindo on Our Many Selves, Planes and Parts of the Being, pp. xxxii-xxxiii
This episode is also available as a blog post at https://sriaurobindostudies.wordpress.com/2023/06/21/the-path-to-the-attainment-of-integral-self-knowledge/