The syllable is made up of the Tibetan letter A surmounted by a half moon and a tiglé.
During the practice of the Lama’i Naljor of Ma-gÇig Labdrön we unify with her beginningless wisdom Mind through visualising the white syllable Om at her forhead. We receive rays of white light and the syllable Om appears at our forehead. Through receiving empowerment from Ma-gÇig Labdrön we realise that Om is the limitless space of the nature of Mind in which existence and non-existence are non-dual.
Om is the symbol of emptiness, the self-existent ground of existence, kadag (ka dag) – the condition of primal purity. This is the sphere of unconditioned potentiality—Dharmakaya, chö-ku (chos sKu)—and the nature of our beginningless unborn unceasing enlightened state, which sparkles through the fabric of our conditioning without effort or need of practice. Kadag is unconditioned, unlimited, and beyond definition.