उर्वशीलोकमन् विच्छन्सर्वदेवमयं हरिम् ॥ ४७ ॥
tena — by generating such a fire; ayajata — he worshiped; yajña-īśam — the master or enjoyer of the yajña; bhagavantam — the Supreme Personality of Godhead; adhokṣajam — beyond the perception of the senses; urvaśī-lokam — to the planet where Urvaśī was staying; anvicchan — although desiring to go; sarva-deva-mayam — the reservoir of all demigods; harim — the Supreme Personality of Godhead.
By means of that fire, Purūravā, who desired to go to the planet where Urvaśī resided, performed a sacrifice, by which he satisfied the Supreme Personality of Godhead, Hari, the enjoyer of the results of sacrifice. Thus he worshiped the Lord, who is beyond the perception of the senses and is the reservoir of all the demigods.
As stated in Bhagavad-gītā, bhoktāraṁ yajña-tapasāṁ sarva-loka-maheśvaram: any loka, or planet, to which one wants to go is the property of the Supreme Personality of Godhead, the enjoyer of the performance of sacrifice. The purpose of yajña is to satisfy the Supreme Personality of Godhead. In this age, as we have explained many times, the yajña of chanting the Hare Kṛṣṇa mahā-mantra is the only sacrifice that can satisfy the Supreme Lord. When the Lord is satisfied, one can fulfill any desire, material or spiritual. Bhagavad-gītā (3.14) also says, yajñād bhavati parjanyaḥ: by offering sacrifices to Lord Viṣṇu, one can have sufficient rainfall. When there is sufficient rainfall, the earth becomes fit to produce everything (sarva-kāma-dughā mahī). If one can utilize the land properly, one can get all the necessities of life from the land, including food grains, fruits, flowers and vegetables. Everything one gets for material wealth is produced from the earth, and therefore it is said, sarva-kāma-dughā mahī (Bhāg. 1.10.4). Everything is possible by performing yajña. Therefore although Purūravā desired something material, he factually performed yajña to please the Supreme Personality of Godhead. The Lord is adhokṣaja, beyond the perception of Purūravā and everyone else. Consequently, some kind of yajña must be performed to fulfill the desires of the living entity. Yajñas can be performed in human society only when society is divided by varṇāśrama-dharma into four varṇas and four āśramas. Without such a regulative process, no one can perform yajñas, and without the performance of yajñas, no material plans can make human society happy at any time. Everyone should therefore be induced to perform yajñas. In this Age of Kali, the yajña recommended is saṅkīrtana, the individual or collective chanting of the Hare Kṛṣṇa mahā-mantra. This will bring the fulfillment of all necessities for human society.