The fact is that devotional service is bestowed by the blessings of a pure devotee (sa mahātmā su-durlabhaḥ). A pure devotee is the supreme transcendentalist, and one has to receive his mercy for one's dormant Kṛṣṇa consciousness to be awakened. One has to associate with pure devotees. If one has firm faith in the words of a great soul, pure devotional service will awaken.
In this chapter Śrī Caitanya Mahāprabhu differentiates between a pure devotee and others. He also describes the characteristics of a pure devotee. A devotee's most formidable enemy is association with women in an enjoying spirit. Association with nondevotees is also condemned because it is also a formidable enemy on the path of devotional service. One has to fully surrender unto the lotus feet of Kṛṣṇa and give up attraction for women and nondevotees.