The Srimad-Bhagavatam (11.2.45-47) teaches that the first-rate devotee always sees the Supreme Lord as the Soul of all living beings. So he sees Krishna, and nothing else, in everyone. The mid-level pure devotee places all his trust in God, the Supreme Person, befriends other pure devotees, helps the innocent, and shuns atheists or those who oppose devotional service. The third-order devotee practices devotional service as directed by the spiritual master, or by family tradition, and worships Deity; however, he is not well versed in the science of devotion and fails to distinguish a devotee from a non-devotee. Such a neophyte cannot really be considered a pure devotee; although he is almost established in the devotional path, his position indeed remains precarious.
It can therefore be concluded that when a person shows love for God and friendship with devotees, shows compassion for the innocent and unwilling to associate with non-devotees, he can be considered a pure devotee. As she progresses in devotional service, she will perceive that every living being is an integral part of the Supreme. She will be able to see in everyone the Divine Person, and thus attain a high degree of fulfillment in Krishna consciousness. Having reached this level, she will cease to distinguish between devotees and non-devotees, seers all occupied in serving the Lord. She will nevertheless continue to develop all commendable qualities even as she practices Krishna consciousness and devotional service.
All the outstanding virtues of heavenly beings are manifested in anyone who has developed a pure and unadulterated devotion to the Supreme Lord. On the contrary, the being devoid of such a service is sure to go astray, despite all his material qualities, since he wanders at the mental level. Its material qualities therefore prove to be worthless.
A Krishna-conscious person, who devotes himself entirely to the Lord's sublime loving service, acquires many divine virtues from heavenly beings, only some of which Chaitanya describes to Sanatane Gosvami. Always benevolent towards all, the devotee does not seek quarrel with anyone. His interest is in the essence of life, which is spiritual in nature. Equally disposed towards all, no one can find fault with him. His magnanimous mind is always pure and devoid of any material obsession. Benefactor of all living beings, he is peaceful and always surrendered to Krishna. Devoid of material desires, he is very humble and determined. Having conquered the six material faults, including anger and lust, he does not eat more than necessary. Always sane and respectful, he does not seek respect for himself. He is serious, merciful, friendly, poet, expert and silent.