Patanjali has used the word dridhabhumi in relation to abhyasa (practice) of the eight limbs of Yoga, and has said that when the practice of Yoga is continued for Dirgha kala (a long time), without any interruption or nairantarya (gap) and carried out with commitment and satkara (respect), then it becomes dridha bhumi (firm and stable) Yoga Sutra I – 14). In the third chapter of Yoga Sutra, Patanjali has used the word bhumi in relation to samyama (mental concentration) as the ground for pinpointed fixation of the chitta (mind) (III: 6). The ground is differentiated into lower and upper stages. When the mind is perfectly stabilized on an adhara-bhumi (lower ground), the adept can proceed to further make it stable on an anatara-bhumi (higher ground). In this manner, progress on the yogic path is to be continued. Patanjali’s commentator Vyasa has used the word bhumi in relation to the chitta (mind) (Yoga Sutra I.1). It means the different stages of existence of the chittabhumis (...