A classification of sins of non-injury, etc., may be made according as they are actually done, or caused to be done, or permitted to be done; and these again may be further divided according as they are preceded by desire, anger or ignorance; these are again mild, middling or intense. Thus we see that there may be twenty-seven kinds of such sins. Mild, middling and intense are each again threefold, mild-mild, mild-middling and mild-intense; middling-mild, middling-middling and middling-intense; also intense-mild, intense-middling and intense-intense. Thus there are eighty-one kinds of sins. But they become infinite on account of rules of restriction, option and conjunction.
The contrary tendency consists in the notion that these immoral tendencies cause an infinity of pains and untrue knowledge. Pain and unwisdom are the unending fruits of these immoral tendencies, and in this idea lies the power which produces the habit of giving a contrary trend to our thoughts.
These yamas, together with the niyamas about to be described, are called kriyāyoga, by the performance of which men become fit to rise gradually to the state of jñānayoga by samādhi and to attain kaivalya. This course thus represents the first stage with which ordinary people should begin their Yoga work.
Those more advanced, who naturally possess the virtues mentioned in Yama, have no need of beginning here.
Thus it is said that some may begin with the niyamas, asceticism, svādhyāya and devotion to God; it is for this reason that, though mentioned under the niyamas, they are also specially selected and spoken of as the kriyāyoga in the very first rule of the second Book. Asceticism means the strength of remaining unchanged in changes like that of heat and cold, hunger and thirst, standing and sitting, absence of speech and absence of all indications by gesture, etc.
Svādhyāya means the study of philosophy and repetition of the syllable “Aum.”
This Īśvarapraṇidhāna (devotion to God) is different from the Īśvarapraṇidhāna mentioned in Yoga-sūtra, I. 23, where it meant love, homage and adoration of God, by virtue of which God by His grace makes samādhi easy for the Yogin.
Here it is a kind of kriyāyoga, and hence it means the bestowal of all our actions upon the Great Teacher, God, i.e. to work, not for one’s own self but for God, so that a man desists from all desires for fruit therefrom.
When these are duly performed, the afflictions become gradually attenuated and trance is brought about. The afflictions thus attenuated become characterised by unproductiveness, and when their seed-power has, as it were, been burnt up by the fire of high intellection and the mind untouched by afflictions realises the distinct natures of purusha and sattva, it naturally returns to its own primal cause prakṛti and kaivalya is attained.
Those who are already far advanced do not require even this kriyāyoga, as their afflictions are already in an attenuated state and their minds in a fit condition to adapt themselves to samādhi; they can therefore begin at once with jñānayoga. So in the first chapter it is with respect to these advanced men that it is said that kaivalya can be attained by abhyāsa and vairāgya, without adopting the kriyāyoga (Yoga-vārttika, II. 2) kriyāyogas. Only śauca and santosha now remain to be spoken of. Śauca means cleanliness of body and mind. Cleanliness of body is brought about by water, cleanliness of mind by removal of the mental impurities of pride, jealousy and vanity.