Krishna understood by a Devotee

"O Lord, no one can understand Your transcendental pastimes, which appear to be human and are so misleading. You have no specific object of favor, nor do You have any object of envy. People only imagine that You are partial."

Prabhupada:

na veda kascid bhagavams cikirsitam
tavehamanasya nrnam vidambanam
na yasya kascid dayito 'sti karhicid
dvesyas ca yasmin visama matir nrnam

So Kuntidevi is clarifying the matter that people may think that Krsna was partial to the Pandava family and He was envious to the Kurus because He always took part on behalf of the Pandavas. That has been described. So just like worldly men, we, we make some friends, and we make some enemies. To somebody we are envious, and to somebody we are very friendly. This is material nature. The material nature means to become envious, generally. And if somebody satisfies my sense gratification, then he's friend. That is also temporary. As soon as the sense gratification process is disturbed, then again envious. The real nature is enviousness. So Kuntidevi says that "Because You are playing the part of human being, and it appears that You are partial to somebody and You are envious to somebody, this is vidambanam; this is Your misleading. Actually You are not like that. Actual... But because You are playing the part of the ordinary human being, not ordinary, but as human being, so Your dealing like that appears that You are, to some, to somebody You are very partial and somebody You are inimical."

But that is not the fact. People cannot understand Krsna because Krsna can be understood by the devotee only.

naham prakasah sarvasya
yogamaya-samavrtah
mudho 'yam nabhijanati
loko mam ajam avyayam
 [Bg. 7.25]

Those who are mudhas, they cannot understand Krsna. Krsna is playing, although like that, ordinary human being. The mudhas cannot understand. Just like Krsna killed Putana, but she got elevation to the position of His mother. Superficially it appeared that Krsna killed the Putana, but Putana, Krsna took her as her (His) mother. Although she came to kill Krsna with poison on her breast, but Krsna thought that "This woman has come to kill Me, but because I have sucked her breast, she is My mother." So any way, the service side, Krsna always accepts, a little service. Therefore in the Bhagavad-gita it is said, svalpam apy asya dharmasya trayate mahato bhayat. Svalpam asya. 

A little service to Krsna is feasible, is helpful to save a man from the greatest danger.

- Excerpt from a lecture by Srila Prabhupada on SB 1.18.29 :: 1974