Mbh 6.28.4c

[177] Others again perform the sacrifice of wealth, the sacrifice of ascetic austerities, the sacrifice of meditation, the sacrifice of (Vedic) study, the sacrifice of knowledge, and others are ascetics of rigid vows.[178] Some offer up the upward vital wind (Prana) to the downward vital wind (apana); and others, the downward vital wind to the upward vital wind; some, arresting the course of (both) the upward and the downward vital winds, are devoted to the restraint of the vital winds. Others of restricted rations, offer the vital winds to the vital winds.[179] Even all these who are conversant with sacrifice, whose sins have been consumed by sacrifice, and who eat the remnants of sacrifice which are amrita, attain to the eternal Brahma. (Even) this world is not for him who doth not perform sacrifice. Whence then the other, O best of Kuru’s race? Thus diverse are the sacrifices occurring in the Vedas. Know that all of them result from action, and knowing this thou wilt be emancipated. The sacrifice of knowledge, O chastiser of foes, is superior to every sacrifice involving (the attainment of) fruits of action, for all action, O Partha, is wholly comprehended in knowledge.[180] Learn that (Knowledge) by prostration, enquiry, and service. They who are possessed of knowledge and can see the truth, will teach thee that knowledge, knowing which, O son of Pandu, thou wilt not again come by such delusion, and by which thou wilt see the endless creatures (of the universe) in thyself (first) and then in me. Even if thou be the greatest sinner among all that are sinful, thou shalt yet cross over all transgressions by the raft of knowledge. As a blazing fire, O Arjuna, reduceth fuel to ashes, so doth the fire of knowledge reduce all actions to ashes. For there is nothing here that is so cleansing as knowledge. One who hath attained to success by devotion finds it without effort within his own self in time.