Substance of Bhakti is Surrender and Humility.
Offenses against vaishnavas and negligence at following regulative principles are the most dangerous obstacles in Bhakti.
Wherever there is worst ignorance, there is the greatest need of bhakti.
Bhakti and Humility cannot be separated like sweetness cannot be separated from sweet.
Only a grateful heart can cultivate Bhakti.
On the path of Bhakti, there is no impediment except for the lack of our own desire.