Tapah or austerities of speech in sattva guna the mode of goodness are words that cause no worry or trepidation. Words that are truthful, encouraging and beneficial, giving an impetus for spiritual development and resulting in attraction to the Supreme Lord Krishna or any of His authorised incarnations and expansions as well as proper recitation of Vedic mantras are all actions of speech in sattva guna.

Lord Krishna states that what is known as austerity of speech is svadhaya or the recitation of Vedic mantras after first being duly initiated by the Vaisnava spiritual master. Words which consist totally of truth yet do not offend those spoken to and which are imbued with sweet and pleasing words that are inspiring and beneficial are austerities of speech in sattva guna the mode of goodness.

Lord Krishna speaks of the austerity of speech as the recitation of the Vedas, Puranas, Upanisads, Ramayan, Mahabharata and others along with the chanting of Vedic mantras. Also speaking words that are totally truthful yet causes no offence to those addressed while speaking words that are pleasant to be heard as well as beneficial and gives satisfaction. All these are austerities of speech in sattva guna the mode of goodness.