17.16 Manah-prasadah, tranillity of mind, making the mind free from anxiety; saumyatvam, gentleness-that which is called kindliness of spirit, [Kindliness towards all, and also not entertaining any evil thought towards anybody.] a certain condition of the mind resulting in calmness of the face, etc.; maunam, reticence-since even the control of speech follows from the control of mind, therefore the cause is implied by the effect; so maunam means control of the mind; [Or, maunam may mean thinking of the Self, the attitude of a meditator. The context being of 'mental austerity', reticence is explained as control of the mind with regard to speech.] atma-vinigrahah, withdrawal of the mind-withdrawal of the mind in a general way, from everything; maunam (control of the mind) is the mind's withdrawal with regard to speech alone; this is the distinction-; bhava-samsuddhih, purity of heart, absence of trickery while dealing with others; iti etat, these are; what is ucyate, called; manasam, mental; tapah, austerity.
How the above-described bodily, verbal and mental austerities undertaken by poeple are divided into three classes-of sattva etc.-is being stated: