nityam yad-antar nija-jivitepsubhih
pitamrtair apy amaraih pratiksyate
atha—thereafter; agha-nama—a very powerful demon by the name Agha; abhyapatat—appeared on the spot; maha-asurah—a great, extremely powerful demon; tesam—of the cowherd boys; sukha-kridana—the enjoyment of their transcendental pastimes; viksana-aksamah—being unable to see, he could not tolerate the transcendental happiness of the cowherd boys; nityam—perpetually; yat-antah—the end of the life of Aghasura; nija-jivita-ipsubhih—just to live undisturbed by Aghasura; pita-amrtaih api—although they drank nectar every day; amaraih—by such demigods; pratiksyate—was also being awaited (the demigods were also awaiting the death of the great demon Aghasura).
My dear King Pariksit, thereafter there appeared a great demon named Aghasura, whose death was being awaited even by the demigods. The demigods drank nectar every day, but still they feared this great demon and awaited his death. This demon could not tolerate the transcendental pleasure being enjoyed in the forest by the cowherd boys.
One may ask how Krsna’s pastimes could be interrupted by a demon. Srila Visvanatha Cakravarti Thakura answers this question by saying that although the transcendental pleasure being enjoyed by the cowherd boys could not be stopped, unless they stopped the transcendental pleasure of their various activities they could not eat their lunch. Therefore at lunchtime Aghasura appeared by the arrangement of yogamaya, so that for the time being they could stop their activities and take lunch. Changing varieties are the mother of enjoyment. The cowherd boys would continuously play, then stop, and then again enjoy in a different way. Therefore every day a demon would come and interrupt their sporting pastimes. The demon would be killed, and then the boys would engage again in their transcendental pastimes.
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