ahymsin newsletter, issue - 14, October - November ' 2009  

पूर्ण - आहुति
pūrṇa - āhuti

The Offering of Completeness, of Perfection Which Is Made with the Mantra

पूर्णमदः पूर्णमिदं पूर्णात्पूर्णमुदच्यते।
पूर्णस्य पूर्णमादाय पूर्णमेवावशिष्यते॥
pūrṇam adaḥ pūrṇam idaṁ
pūrṇāt pūrṇam udacyate|
pūrṇasya pūrṇam ādāya
pūrṇam evāvaśiṣyate||

That is pūrṇa; this is pūrṇa.
pūrṇa is taken  from the pūrṇa.
Upon taking pūrṇa from the pūrṇa
what remains, too, is pūrṇa.

The word pūrṇa means filled, fulfilled, complete, perfected, as perfect as God.
“That” always refers to the transcendent and “this” to the tangible material, eminent universe including ourselves. The definition of infinity recited in the fire ritual is as above.
— Swami Veda Bharati—