Once, when Krishna and Balarama were playing on the bank of the Yamuna, a demon of the name Vatsasura assumed the shape of a calf and came there intending to kill the brothers. By taking the shape of a calf, the demon could mingle with the other calves. Krishna, however, specifically noticed this, and He immediately alerted Balarama about the entrance of the demon. Both brothers then silently approached him. Krishna caught hold of the demon-calf by the two hind legs and tail, whipped him around very forcibly and threw him up into a tree. The demon lost his life and fell down from the top of the tree to the ground. When the demon lay dead on the ground, all the playmates of Krishna congratulated Him, "Well done! Well done!" and the demigods in the sky showered flowers with great satisfaction. In this way, the maintainers of the complete creation, Krishna and Balarama, used to take care of the calves every day, beginning in the morning, and thus They enjoyed Their childhood pastimes as cowherd boys in Vrindavana.
When the boys saw the showering of flowers and heard the celestial sounds, they became struck with wonder. And when they saw Krishna freed from the mouth of the great demon Bakasura, all of them, including Balarama, were so pleased that it seemed as if they had regained their very source of life. As soon as they saw Krishna coming toward them, they one after another embraced the son of Nanda and held Him to their chests. After this, they assembled all the calves under their charge and began to return home.
When they arrived home, they spoke of the wonderful activities of the son of Nanda. When the gopis and cowherd men all heard the story from the boys, they felt great happiness because naturally they loved Krishna, and by hearing about His glories and victorious activities they became still more affectionate toward Him. Thinking that child Krishna had been saved from the mouth of death, they looked upon His face with great love and affection. They were full of anxiety and could not turn their faces from the vision of Krishna. The gopis and the men began to converse amongst themselves about how wonderful it was that child Krishna had been attacked in so many ways and so many times by so many demons, and yet the demons themselves had been killed and Krishna had remained uninjured. They continued to converse amongst themselves about how so many great demons in such fierce bodies had attacked Krishna to kill Him but, by the grace of Hari, had not been able to cause even a slight injury. Rather, they had died like small flies in a fire. Thus they remembered the words of Garga Muni, who had foretold, by dint of his vast knowledge of the Vedas and astrology, that this boy would be attacked by many demons. Now they were actually seeing that this was coming true, word for word.
All the cowherd men, including Nanda Maharaja, used to talk of the wonderful activities of Lord Krishna and Balarama, and they were always so much absorbed in those talks that they forgot the threefold miseries of this material existence. This is the effect of Krishna consciousness. What was enjoyed five thousand years ago by Nanda Maharaja can still be enjoyed by Krishna conscious persons simply by talking about the transcendental pastimes of Krishna and His associates.