Although the motive (of a devotee) might be impure, the Lord does not consider the motive; He is concerned with the service. However if a devotee has a particular motive, the Lord directly or indirectly knows it and therefore, He does not leave the devotee’s material desire unfulfilled. These are some of the special favours by the Lord to a devotee.
It is the causeless mercy of the Supreme Lord that He always tries to bring us back home, back to Godhead. God is liberated and He tries to make us liberated, but although He is constantly trying, we refuse to accept His instructions. Nonetheless, He has not become angry.
It is actually the Lord’s mercy that He takes the trouble to rectify our misbehaviour, although faithless persons criticize the Lord’s fatherly vigilance.
Out of fear of the Supreme Lord, the wind blows, the sun distributes its heat and death chases everyone.
The impersonal Brahman is Lord Krishna's bodily effulgence. As fireflies seem brilliant when the sun does not shine, so the impersonal Brahman is glorious only when Lord Krishna's form remains unseen.
The Supreme Lord cannot be obtained by one who is qualified by being a great lecturer, a great scholar or a great student of the Vedic literature. The Lord reveals His own form to one with whom He is pleased.