One should learn how to cry for the Lord. One should learn this small technique, he should be very eager and actually cry to become engaged in some particular type of service, This is called 'laulyam' and such tears are the price for the highest perfection. If one develops this 'laulyam', or excessive eagerness for meeting and serving the Lord in a particular way, that is the price to enter into the kingdom of God. — The Nectar of Devotion, Page 83.
To use mind in thinking of Krishna is as equivalent as to engage body in the service of Krishna.
The big fish, shark, they do not to come into the river. They constantly remain in the ocean. Similarly, those who are pure devotee always remain in the ocean of transcendental loving service to the Lord.
No one has the ability to imitate the activities of material nature as conducted by the Supreme Personality of Godhead.
The Lord is just like a cloud which pours rain all over, regardless of whether it falls on rock or land or water. But for His devotees, He gives speciﬁc attention.