Prāṇāyāma is common to both Haṭha and Rāja Sādhana,
whether working with the Prāṇa Śodhana of Haṭha Yoga,
where you were taught to practice it at each
of four transitional points through the day,
or with the Citta Śodhana of Patañjali,
where it is the pivotal Bahya Aṅga,
Prāṇāyāma is seen as the primary means to engage
the Élan Vital, the vital force or creative principle.