The sankirtana movement can be spread by a person who is especially favored by Lord Krsna (krsna-sakti vina nahe tara pravartana). Without first obtaining the mercy of the Lord, one cannot spread the holy name of the Lord. One who can spread the Lord's name is called labdha-caitanya in the words of Bhaktisiddhanta Sarasvati. The labdha-caitanya is one who has actually awakened his original consciousness, Krsna consciousness. The influence of the pure devotees in Krsna consciousness is such that it can awaken others to become immediately Krsna conscious and engage themselves in the transcendental loving service of Krsna. In this way the descendants of pure devotees increase, and Lord Caitanya Mahaprabhu takes much pleasure in seeing the increase of His devotees. The word su-medhasah means "sharply intelligent." When one's intelligence is sharp, he can increase the interests of common men in loving Caitanya Mahaprabhu and through Him in loving Radha-Krsna. Those not interested in understanding Sri Caitanya Mahaprabhu are simply material in their attempts at professional chanting and dancing for money, despite their supposed artistry. If one does not have full faith in Sri Caitanya Mahaprabhu, he cannot properly chant and dance in the sankirtana movement. Artificial chanting and dancing may be due to sentiments or sentimental agitation, but this cannot help one advance in Krsna consciousness.