Let's begin by looking at one of the most important yogic texts; The Hatha Yoga Pradeepika. The text describes six yogic purification practices; the Shatkarmas. These purification practices have been used by yogis throughout time, in order to cleanse the physical body and prepare the mind for yoga's deeper practices. The techniques lead to a purified body by removing toxins, leaving it strong and disease-free. This then allows for the prana or life force to flow freely through the body's energy channels regenerating the body's organs, and energetical field and allowing for access to deeper concentration and ultimately access to the higher consciousness through other yogic practices such as meditation. Neti is the first step of these six purification techniques.