Chapter 4 – JnanaYoga
brahmārpaṇaṁ brahma havir
brahmāgnau brahmaṇā hutam
brahmaiva tena gantavyaṁ
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(In the yajna)whatever offered is Brahman, butter offered is Brahman, the fire that is a form of Brahman is being offered to by Brahman. One who sees Brahman in the karma will be completely absorbed in Brahman.
One who sees everything used for a yajna as Brahman, like the ladle, butter, fire, his karma, even himself, he will attain the spiritual kingdom. A person performing karma in transcendental knowledge, sees whatever he does or uses as an offering or part of brahman. Karma done this way purifies self, and he will attain brahman.
Every karma should be done perfectly as though done for brahman.