When we expose ourselves to severe vaisnava-aparadha, it is like pulling our devotional creeper out from the root. It doesn't get the nourishment then we systematically dry out, then we lose the taste for chanting, reading, deity worship, book distribution, what could be worse! We lose devotional service ultimately.
Devotional service is so simple, but devotees because of their material inclinations make it complicated.
Keep up your endeavor for engaging in devotional service. Chanting the Holy Names is a vital point of devotional service. Be sure to improve on your quality of chanting. All other services are strongly supported by chanting of the Holy Name.
In Vaikuntha nothing exists but devotional service, rendered through sankirtana and in many other forms. It goes on incessantly, with great enthusiasm spreading the ecstasy of pure love.
Pure devotional service is the satisfying activity for the soul. So Lord Caitanya was specifically preaching pure devotional service, this was his unique contribution. Even in the history of whole vedic culture it was very rare to find someone who is preaching pure devotional service, other than Narada-muni and some acharyas. Lord Caitanya was very strict he wanted his followers to maintain that integrity of preaching only pure devotional service. When some of his followers visit other people who are not preaching pure devotional service, he would abandon them.
Pure devotional service is so spiritually relishable that a devotee becomes automatically uninterested in material enjoyment. That is the sign of perfection in progressive devotional service. A pure devotee continuously remembers the lotus feet of the Lord Sri Krishna and does not forget Him even for a moment, not even in exchange for all the opulence of the three worlds.