Introduction to the Sugia of Beis Hilel and Beis Shamai and Halacha. Three levels of light: Ohr Atzmi [Yechida, Chaya], Ohr Neshama (Elokim Chayim), Ohr Nefesh Ruach (Elokim). Page 422 ff. NEW SV P. 552 ff. MP3
