aphala-ākāṅkṣibhiḥ — by those devoid of desire for result; yajñaḥ — sacrifice; vidhi-diṣṭaḥ — according to the direction of scripture; yaḥ — which; ijyate — is performed; yaṣṭavyam — must be performed; eva — certainly; iti — thus; manaḥ — mind; samādhāya — fixing; saḥ — it; sāttvikaḥ — in the mode of goodness.