He would know it in proving the power of His Yoga! For if this were the Absolute Lord, He alone would be the Lord of the Lords of all Yogis!
Krishna, sitting with his boys in the forest, discovered that the herds had disappeared from their sight.
On seeing the alarm on the face of His friends, Krishna exclaimed, "I Myself shall fetch back the cows, so be not anxious, eat to your fill of the fruit you are munching."
He searched and called, but the cows were as vanished, and returning again to His playmates He found they too were missing.
Then a smile, as the sun doth break through the clouds, shone on His face, and, with Yoga-Māyā, He divided Himself into cowboys and cows and even into calves, and He Himself leading them who were of Him, the All—He returned with the cows and the boys to the village!
But, mark, when the boys, that were parts of Krishna, Love-Manifest, ran to the arms of their mothers, a thrill that was ecstasy played through their beings, and never did mothers love so their sons as the mothers who held to their hearts the boys whom by His power He had made from Himself!
And so it was with the cows and the calves. Those who milked the cows were wild with joy to stroke their hides and feed them, and milk of those cows as nectar was.
And Krishna stood with the cowboys among the cows and smiled in His wisdom at them all.
Now Brahmā knew that the boy was the Lord, who as child to man had come, for by his Yoga-power he had taken the cows and calves and boys to a cavern and there put them to sleep.
But Krishna, to prove Himself the greatest in power, had divided Himself into boys, cows, and calves, and for one year had been thus.