We have to first understand that there is one common father to all living entities, that is Krishna. And Krishna resides in the heart of all living beings. So those devotees of the Lord who have trained themselves to see Krishna everywhere, can see everybody on an equal level, that of the supersoul within that body. So therefore, Its a matter of training ourselves.
” vidya – vinaya – sampanne
brahmane gavi  hastini
suni caiva sva – pake ca
panditah sama – darsinah.”
That an equipoised pandit, he sees within everything the soul and supersoul, within brahmana, dog, elephant , cow, dog eater. In everybody, chandaal and brahmana, big difference, but he sees them both equal.
How ? he sees Krishna to supersoul within them. So we have to train ourselves to see this way. Ofcourse,  this is the high class, first class devotee , उत्तम अधिकारी .
उत्तम अधिकारी sees Krishna everywhere.
Krsnadas Kaviraj says –
” sthavara – jangama dekhe, na dekhe tara murti
sarvatra nija ista – deva – sphurti .” That he does not see moving or non moving bodies, he sees within the bodies, he is istadeva, Radha Krishna. He sees Krishna  within all beings and that is how he becomes equipoised towards everyone.
Such उत्तम अधिकारी devotees, they don’t discriminate between good persons, bad persons , Christian, Muslim, Hindu, Sikh , इसाई or black or white, tall or short, east or west .
For him, everywhere he sees is ista Radha Krishna. So this is impartial and to see everything equally , all living beings.
So this is how one sees in a pure vision, it is called –
” premanjan -cchurita -bhakti- vilocanena
santah sadaiva hrdayesu vilokayanti
yam syamsundaram acintya -guna-svarupam
govindam adi-purusam tam aham bhajami.”
That his eyes are ointed smear by the love of Krishna and with those ointed eyes, he sees Krishna everywhere, in everything and that’s how he sees everything equal .
Pure devotees, they practice pure, unalloyed devotional service to Krishna and because of that the eyes smeared by love of Krishna, because of this pure bhakti, he is equipoised to all living entities. He sees them equally and practices pure unalloyed devotion to Krishna.
So if you want to have equal vision and impartial partiality, then you have to ride yourself to the pure devotee’s platform, उत्तम अधिकारी,  where there is no discrimination of any kind.