When the races of the Sixth Manvantara therefore became reborn in the Seventh Manvantara,âgavataPurâ they were the most intellectual of all races, but they had also the power given to them of developing spiritual faculties. They could not however shake off the Asuric element all at once. They were extremely fond of material joys, and they devised all means, which human intellect could contrive, of gratifying material desires. That was right which gave material gratification; that was wrong which militated against material enjoyment.
Bhuvar Loka is the plane of animal desires. The human beasts go after death to Bhuvar Loka. They do not possess anything which could take them to Svarga Loka.
The Svarga Loka is for those who develop in themselves the faculty of discriminating between right and wrong, and who do or attempt to do what is right. Far more it is for those who love others and who do good to them. For service and love pertain to planes higher even than Svarga. But in the higher planes, service is unselfish and love is divine. The lower forms of service and love pertain to the plane of Svarga. In Svarga there is selfishness, but it is mixed with spirituality. It is only the good, the virtuous, the devoted that go to the plane of the Devas and there gratify their higher desires to their heart's content. There are divine music, divine beauty, divine objects of gratification in Svarga Loka -- allurements enough for a man of desire. And if his merits be great, he enjoys the things of Svarga Loka for an enormously long period.
But a man by bare intellectuality can not cross the threshold of Svarga. The Devas reject the intruder. However much Trisanku might aspire to have the enjoyments of Svarga, and however great his intellect might be, he was not allowed to enter the coveted plane, without the passport of spirituality. Humanity had still to learn the proper means of securing life in Svarga.
Poor and chance spiritual acquisitions give only a passing life in Svarga and that not of a superior character. So all the knowledge as to attaining Svarga life had to be revealed in time.
The Rishis made great efforts to improve humanity by securing for them a prolonged existence in Svarga, most of all Rishi Visvâmitra, one of the seven sages of our Manvantara. Visvâmitra failed in his attempt to send Trisanku to Svarga. He then tried with his son Haris Chandra. It is said he advised the Râjâ to make a human sacrifice to Varuna. But we find the victim Sunah-sepha living after the sacrifice, under the name of Deva-rata, or one given up to the gods, and some of the Riks even were revealed to him. Haris Chandra succeeded in entering Svarga. That was a great victory for Rishi Visvâmitra. The Vedas were revealed to the Rishis and sacrifices came to be known.