Lord Krsna is not partial to anyone

The Lord’s mercy upon the fallen souls is equally distributed. He has no one as the specific object of hostility. The very conception of the Personality of Godhead as a human being is misleading. His pastimes appear to be exactly like a human being’s, but actually they are transcendental and without any tinge of material contamination. He is undoubtedly known as partial to His pure devotees, but in fact He is never partial, as much as the sun is never partial to anyone. 

By utilizing the sun rays, sometimes even the stones become valuable, whereas a blind man cannot see the sun, although there are enough sun rays before him. Darkness and light are two opposite conceptions, but this does not mean that the sun is partial in distributing its rays. The sun rays are open to everyone, but the capacities of the receptacles differ. Foolish people think that devotional service is flattering the Lord to get special mercy. 

Factually the pure devotees who are engaged in the transcendental loving service of the Lord are not a mercantile community. A mercantile house renders service to someone in exchange for values. The pure devotee does not render service unto the Lord for such exchange, and therefore the full mercy of the Lord is open for him. 

Suffering men, needy men, inquisitive persons, or philosophers make temporary connections with the Lord to serve a particular purpose. When the purpose is served, there is no more relation with the Lord. A suffering man, if he is pious at all, prays to the Lord for his recovery. But as soon as the recovery is over, in most cases the suffering man no longer cares to keep any connection with the Lord. The mercy of the Lord is open for him, but he is reluctant to receive it. SB 1.8. 29