Answer by Niraj Bidawatka
One can become a sincere devotee of God by taking the shelter of a self-realized spiritual master, who is always engaged in the service of Krishna through his mind, body and speech. Without taking shelter of the devotees of Krishna, one cannot even hope of being recognized by Krishna.
Krishna, in the Adi Purana states, mad bhaktanam ca ye bhatka te me bhakta tama matah: “Those who are the devotees of My devotee, are My real devotees.” Krishna, in this verse, makes it abundantly clear that He does not consider those persons as His devotees, who claim that they are His direct devotees.
The great King Kulshekhara in a famous verse of the Mukund Mala Stotra prays that he would consider it as a great mercy if Krishna could consider him as the servant of the servant of the servant of the servant of the servant of the servant of Krishna’s servant. The King wants to become a servant seven times removed.
So one can become sincere only by becoming the servant of the servant of Krishna.