When the mind attains internal śauca, or cleanliness of mind, his sattva becomes pure, and he acquires highmindedness, one-pointedness, control of the senses and fitness for the knowledge of self. By the steadiness of contentment comes the acquisition of extreme happiness. By steadiness of asceticism the impurities of this body are removed, and from that come miraculous powers of endurance of the body and also miraculous powers of the sense, viz. clairaudience and thought-reading from a distance. By steadiness of studies the gods, the ṛshis and the siddhas become visible. When Īśvara is made the motive of all actions, trance is attained. By this the Yogin knows all that he wants to know, just as it is in reality, whether in another place, another body or another time. His intellect knows everything as it is. It should not, however, be said, says Vācaspati, that inasmuch as the saṃprajñāta is attained by making Īśvara the motive of all actions, the remaining seven yogāṅgas are useless. For the yogāṅgas are useful in the attainment of that mental mood which devotes all actions to the purposes of Īśvara. They are also useful in the attainment of saṃprajñāta samādhi by separate kinds of collocations, and samādhi also leads to the fruition of saṃprajñāta, but though this meditation on Īśvara is itself a species of Īśvarapraṇidhāna, saṃprajñāta Yoga is a yet more direct means. As to the relation of Īśvarapraṇidhāna with the other aṅgas of Yoga, Bhikshu writes:—It cannot be asked what is the use of the other disciplinary practices of the Yoga since Yoga can be attained by meditation on Īśvara, for meditation on Īśvara only removes ignorance. The other accessories bring about samādhi by their own specific modes of operation. Moreover, it is by help of meditation on Īśvara that one succeeds in bringing about samādhi, through the performance of all the accessories of Yoga; so the accessories of Yoga cannot be regarded as unnecessary; for it is the accessories which produce dhāraṇa, dhyāna and samādhi, through meditation on God, and thereby salvation; devotion to God brings in His grace and through it the yogāṅgas can be duly performed. So though devotion to God may be considered as the direct cause, it cannot be denied that the due performance of the yogāṅgas is to be considered as the indirect cause. Āsanas are secured when the natural involuntary movements cease, and this may be effected by concentrating the mind on the mythological snake which quietly bears the burden of the earth on its head. Thus posture becomes perfect and effort to that end ceases, so that there is no movement of the body; or the mind is transformed into the infinite, which makes the idea of infinity its own and then brings about the perfection of posture. When posture has once been mastered there is no disturbance through the contraries of heat and cold, etc.