Symptom of A Pure Devotee
This is the symptom of a pure devotee. One should serve the spiritual master first. It is not that one should bypass the spiritual master and desire to serve the Supreme Lord. This is not the principle for a Vaishnava.
Eligibility For Going Back To Godhead
To travel in another country, you need visa permission, similarly to go back to Godhead you need permission & mercy from his pure devotee.
Speech of A Pure Devotee
When a pure devotee or spiritual master speak, what he says should be accepted as having been directly spoken by the Supreme Personality of Godhead in the Parampara System. — Sri Caitanya Caritamrita, Antya Lila, 05.71.
Tribulations
A pure devotee of the Lord accepts tribulation as favours from the Lord. Since the Lord is absoulte, there is no mundane difference between the two. (Between tribulation and favours). — Srimad Bhagavatam, 01.09.17.
Vaishnavas are Sinless
Only a pure devotee, whom we deem to be a vaishnava, can be considered sinless.
Pure Devotees
Pure devotees, who take transcendental pleasure in hearing and chanting the glories of the Lord, do not care for any kind of liberation; even if they are offered the five liberations, they refuse to accept them