Jayapataka Swami explains how Krishna shows special affection toward his devotees through a quality called Bhaktavatsala. He uses the analogy of a candle lighting other candles to describe Krishna as the original source and his expansions as distinct yet simultaneous manifestations.
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Lord knows how to glorify and increase the glories of his bodies devotees to them he keeps them Accordingly King Lord was controlled by the love of his devotees Knows how to increase the influence and glories of his bodies knows how devoid of the Bodhi association do not understand it so just as the Lordis render various voting services respect and affection for their worship of the Lord a Lord who is alive is devoted also like to render some personal services or as the orders Narcissus rang his affliction and loving relationship with his devotees. Not that the Lord is saying that he is not the ultimate worshipable object but he is displaying his quality of Bhaktavatsala. By displaying of Bhaktavatsala or Russian Raj devotion He has shown how wonderful he is and how his devotee is very fortunate. So he reveals to the world how the devotee and him have a very special relationship. Reverend Shou on the right side of the Rumschild and loving from his son. Actually the Lord is one but he like a candle can light many other candles. All the candles have the same candle power but one is original. So Ka is the original supreme personality of God and the Doja is His extension. But they have God come simultaneously one and different. Krishna can understand everything and he exhibits his will through his extension. That's why they say that it is one God but he has another form. So seeing it something which is ungroundable on one hand Ka and Maha Vishnu are not different. It has got Mahavishnu. Ka can know Maharishna but Mahavishnu cannot know everything about Ka. How this works is beyond our ability to understand.