Surrendered souls, even from groups leading sinful lives, such as women, the laborer class, the mountaineers and the Siberians, or even the birds and beasts, can also know about the science of Godhead and become liberated from the clutches of the illusory energy by surrendering unto the pure devotees of the Lord and by following in their footsteps in devotional service.
(Srimad Bhagavatam-------2:7:46------translation).

With the dust of My devotees' lotus feet I desire to purify the material worlds, which are situated within Me. Thus, I always follow thefootsteps of My pure devotees, who are free from all personal desire, rapt in thought of My pastimes, peaceful, without any feelings of enmity, and of equal disposition everywhere.
(Srimad Bhagavatam-------11:14:16------translation).

The instructions of a pure devotee to his disciple are also very simple. No one feels any difficulty in following in the footsteps of a pure devotee of the Lord. Anyone who follows in the footsteps of recognized devotees, such as Lord Brahmā, Lord Śiva, the Kumāras, Manu, Kapila, King Prahlāda, King Janaka, Śukadeva Gosvāmī, Yamarāja and their followers in disciplic succession, very easily finds the door of liberation open. On the other hand, those who are not devotees but are engaged in uncertain processes of self-realization, such as jñāna, yoga and karma, are understood to be still contaminated. Such contaminated persons, although apparently advanced in self-realization, cannot even liberate themselves, what to speak of those who follow them. Such nondevotees are compared to chained animals, for they are not able to go beyond the jurisdiction of the formalities of a certain type of faith. In the Bhagavad-gītā they are condemned as veda-vāda-rata. They cannot understand that the Vedas deal with activities of the material modes of nature—goodness, passion and ignorance. But as Lord Kṛṣṇa advised Arjuna, one has to go beyond the jurisdiction of the duties prescribed in the Vedas and take to Kṛṣṇa consciousness, devotional service. The Lord says in the Bhagavad-gītā, nistrai-guṇyo bhavārjuna: “My dear Arjuna, just try to become transcendental to the Vedic rituals.” This transcendental position beyond the Vedic ritualistic performances is devotional service. In the Bhagavad-gītā the Lord clearly says that persons who are engaged in His devotional service without adulteration are situated in Brahman. Actual Brahman realization means Kṛṣṇa consciousness and engagement in devotional service. The devotees are therefore real brahmacārīs because their activities are always in Kṛṣṇa consciousness, devotional service.
(Krsna Book).

The six symptoms of fully surrendered souls are also described in this chapter. Devotional service has been divided into two categories-regulative devotional service and spontaneous love. There are sixty-four items listed in regulative devotional service, and out of these sixty-four the last five are considered very important. By practicing even one of the nine processes of devotional service, one can become successful. Speculative knowledge and mystic yoga can never help one in devotional service. Pious activity, nonviolence, sense control and regulation are not separate from devotional service in its pure form. If one engages in devotional service, all good qualities follow. One does not have to cultivate them separately. Spontaneous devotional service arises when one follows a pure devotee who is awakened to spontaneous love of God. Śrī Caitanya Mahāprabhu describes the symptoms of devotees who are already situated in spontaneous love of God. He also describes the devotees who are trying to follow in the footsteps of the pure devotees.
(Sri Caitanya Caritamrta-------2:22-------purport).