(Svādhyāya): “Self-study,” is the fourth niyama (moral discipline) in the Yoga Sutras of Patanjali. The idea of self-study can essentially be understood in two ways. First, it refers to the recommendation that the aspirant on the path of yoga should study both the classical texts of yoga and the writings of yoga masters in order to fully comprehend the theory behind the practice. Self-study also indicates the practice of studying or contemplating atman (the Self), which is done through constant awareness, remembrance, discipline, meditation, and, especially, Self-Enquiry. This will eventually lead to the revelation of the Self as the very background of existence, on which all manifestation unfolds. Read more about the niyama here.