Vaisnavas, or devotees, are usually very compassionate upon conditioned souls. Without even being invited, a devotee will go from door to door to enlighten people and to bring them out of the darkness of nescience by injecting knowledge of the living entity’s constitutional position as a servant of Lord Krsna. Such devotees are empowered by the Lord to distribute devotional consciousness, or Krsna consciousness, to the people in general. They are known as authorized spiritual masters, and it is by their mercy that a conditioned soul gets the seed of devotional service.

From The Teachings of Lord Caitanya by Srila Prabhupada