If someone tries to love someone, they are very sincere because sincerity is one aspect of love. So if we are trying to love Krishna, we should pray – Krishna, I want to do my japa properly, sincerely. Please help me.
Sincerity is our greatest guide. What is sincerity? Sincerity means trying with all our energy, thoughts and love to please our spiritual master.
Sincerity in sadhana and eagerness to serve is the basis of one’s relationship with the spiritual master.
The Personality of Godhead may not be present before one's eyes, but if one is sincere in wanting such guidance, the Lord will send a bona fide person who can guide one properly back home, back to Godhead.
A sincere soul is not trying to make a show. His enthusiasm is an act of service.
Please do your duties nicely and Krishna will be pleased to shower His blessings upon you. He is very kind to sincere souls, and He gives intelligence from within to sincere devotees. We require only to become sincere in the service of the Lord, then everything is there ready for our convenience.