Rig veda 3.26.7

अग्निर् अस्मि जन्मना जातवेदा घृतम् मे चक्षुर् अमृतम् म आसन् |
अर्कस् त्रिधातू रजसो विमानो ऽजस्रो घर्मो हविर् अस्मि नाम ||

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agnir asmi janmanā jātavedā ghṛtam me cakṣur amṛtam ma āsan |
arkas tridhātū rajaso vimāno 'jasro gharmo havir asmi nāma ||

- agnir asmi  : I (human being/composer) am the agni (soul/phychic being) 

- janmanā jātavedā: from (physical human) birth i am knower of all (my previous) births

- ghṛtam me cakṣur : Butter (knowledge, supramental light in the mind) is my eye (organ representing the suprementalized mind)

- amṛtam ma āsan : immortality (supramentalized physical being)  is my mouth (the organ representing the physical mind)
- arkas tridhātū : I am the three fold light (mental being, vital being, physical being)

- rajaso vimāno : I measure (fully grasp) the rajas (vital world)

- 'jasro gharmo : unceasing ( deathless) illumination (knowledge) am I

- havir asmi nāma : I (the soul/psychic being) am what is offered (in the sacrifice performed by the mental being human since I am ever connected to gods).