Verse
श्रद्धया परया तप्तं तपस्तत्त्रिविधं नरैः ।अफलाकाङ्क्षिभिर्युक्तैः सात्त्विकं परिचक्षते ॥
śraddhayā parayā taptaṃ tapastattrividhaṃ naraiḥaphalākāṅkṣibhiryuktaiḥ sāttvikaṃ paricakṣate
This threefold askesis, done with a highest enlightened faith, with no desire for fruit, harmonised, is said to be sattwic.
Gītā 17·17Sattwic tapasya is that which is done with a highest enlightened faith, as a duty deeply accepted or for some ethical or spiritual or other higher reason and with no desire for any external or narrowly personal fruit in the action. It is of the character of self-discipline and asks for self-control and a harmonising of one’s nature.
