The smoke of that firc is of the form of Darkness. The quality that is known by the name of Passion is in it ashes. The quality of goodness originate from that portion of the fire into which the oblation is poured.
तस्य धूमस्तमो रूपं रजो भस्मसु तेजसः। सर्वं संजायते तस्य यत्र प्रक्षिप्यते हविः॥