Therefore, the guru is always engaged in chanting. Mahaprabhoh kirtana-nrtya-gita — chanting and dancing. Unless he performs it himself, how can he teach his disciples? So his first symptom is that he will give you such instructions that immediately you will feel relief from all anxiety, and his second symptom is that he is always personally engaged in chanting the holy name of the Lord and dancing.

From “Journey of Self Discovery” 4.2: The Bona Fide Spiritual Master