Bhagavad Gita Chapter 4, Verse 27

सर्वाणीन्द्रियकर्माणि प्राणकर्माणि चापरे | आत्मसंयमयोगाग्नौ जुह्वति ज्ञानदीपिते ||

sarvāṇīndriyakarmāṇi prāṇakarmāṇi cāpare ātmasaṁyamayogāgnau juhvati jñānadīpite

Others, who are enlightened by knowledge, offer all functions of the senses and the functions of the vital airs into the fire of self-control, kindled by knowledge.

Krishna describes another type of sacrifice: offering sense functions and breath functions into the fire of self-control, kindled by knowledge. 'Jñānadīpite' (illumined by knowledge) means understanding transforms sacrifice—when you know why you're restraining, it becomes offering rather than suppression. 'Ātmasaṁyamayogāgnau' (fire of self-control yoga) means the fire of discipline, but kindled by knowledge, not by force. This verse shows that knowledge (understanding) is the fuel that makes sacrifice meaningful—when you understand why you restrain senses or control breath, it's not suppression but offering. Without knowledge, control feels like deprivation. With knowledge, control becomes sacrifice—giving up the lower for the higher.