हठयोग प्रदीपिका (योगी स्वात्माराम - ज्योत्स्ना टीका सहित सटीक)

FOURTH CHAPTER

1. Salutations to Śiva, the Guru, who is of the
   form of nāda, bindu and kalā; the person ever devoted
   to these obtains the stainless state [free from māyā].
   This chapter is wholly devoted to Rāja-yoga. The nāda
   is a mystical sound similar to the prolongation of the sound of
   a bell and represented by a semicircle in Om. Bindu is the ṃ
   sound of the anusvāra in the Praṇava. Kalā is a speciality of nāda.
2. Now I shall expound the excellent process of
   Samādhi, that destroys death, leads to [eternal] happi-
   ness and confers the supreme bliss of [absorption in]
   Brahman.
   ‘Destroying death’ means enabling the Yogin to shed his
   body at will. This is explained later on.
   The happiness of a Jīvanmukta is brought about when the
   mind is stilled and the vāsanā-s (acquired tendencies) are destroyed.
   Bliss is that of Videhamukti, when the Prārabdha-karman is
   exhausted and a permanent union takes place between the Jīva
   and Parabrahman.
   3, 4. Rāja-yoga, Samādhi, Unmanī, Manonmanī,
   Amaratva (immortality), Laya (absorption), Tattva
   (Truth), Śūnyāśūnya (void and yet not-void), Parama-
   pada (the supreme state), Amanaska (transcending the
   mind), Advaita (non-duality), Nirālamba (without
   support), Nirañjana (pure), Jīvanmukti (liberation