In plain words
So Yaśodā put on anger. Not only that: she went up to Kṛṣṇa,
Your whole mouth smells of butter, the whole village is in an uproar, nothing but mischief, and you are no bigger than a fingernail, child! Give up these spoilt ways now, or I will tie you to the mortar...
So she made as if to scold Him. ‘You are making the whole village one great uproar; does the butter of our house not taste good to you? Is it only the butter of other people's houses that tastes so good to you?’ When the mother punishes Him, He then says: ‘The heart of the Gopīs is sacred. It is pure, and free of selfishness. So I steal the butter that is the heart of the Gopīs, untainted by the selfishness called vātsalya, with no thought of their own gain,’ He made known. And He explained, ‘Whoever's heart is pure, whoever's is free of selfishness, such a heart alone I steal.’ They praise the child Kṛṣṇa, do they not, as ‘Cittacorā Yaśodā ke bāl, navanītacora Gopāl’! Kṛṣṇa went on stealing the butter that was the citta of the Gopīs. In this way people think that Kṛṣṇa is a thief. But what Kṛṣṇa stole was not butter; it was the cittas of the Gopīs, which were like butter. They are pure and selfless.
Why worship Śiva without purity of citta? Why that observance without purity of the Ātma? Why that cooking without purity of the vessel? This is a word that tells what is so.
What use is it to cook food in a vessel that is not clean? It is enough to call ‘Rāma’ just once, with purity of citta. ‘What is it, child?’ Rāma answers, then. It is God alone who truly fills us with Ānanda! He Himself is Yama, He Himself is Rāma! That is why Purandaradāsa said: ‘Rāma is no one apart, Yama is no one apart. Yama and Rāma, both are the One alone! To Ugrasena, who believed that Kṛṣṇa was God, He appeared as God.