Krishna does not agree to award devotional service to merely anyone. Krishna can easily offer a person material happiness or even liberation, but He does not agree very easily to award a person engagement in his devotional service. Devotional service can in fact be attained only through the mercy of a pure devotee. — The Nectar of Devotion, Page 14.
Caitanya Mahaprabhu has recommended that everyone chant the Hare Krishna mantra just to cleanse the dust from the heart. If the dust of the heart is cleansed away, then one can actually understand the importance of the holy name.
Nectar of Devotion, Chapter 12,
Everything belongs to Krishna, everything should be employed in the service of Krishna. This perfect form of action in Krishna consciousness is far better than any amount of artiﬁcial renunciation.
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.