Unlocking the Granthis
"By means of pranayama and other yogic techniques, the three granthis—Brahma granthi, Vishnu granthi, and Rudra granthi—are pierced. These knots block the flow of prana through Sushumna and must be opened for the Kundalini to rise." — Hatha Yoga Pradipika, Chapter 4, Verses 3–4
