The rays that emanate from Me (Baba) are of three grades: the Sthula (gross filling this Prasanthi Nilayam, the Sukshma (subtle) pervading the earth, and the Karana (causal) covering the entire universe. The Sthula makes a man a Sadhaka, the Sukshma makes him a Mahatma and the Karana converts him into a Paramahamsa. (Uniq, p. 28)