Madhya 22.71 purport…
The standard of devotion is also categorized in the same way. A neophyte believes that only love of Kṛṣṇa or Kṛṣṇa consciousness is very good, but he may not know the basis of pure Kṛṣṇa consciousness or how one can become a perfect devotee. Sometimes in the heart of a neophyte there is attraction for karma, jñāna or yoga. When he is free and transcendental to mixed devotional activity, he becomes a second-class devoteeWhen he becomes expert in logic and can refer to the śāstras, he becomes a first-class devotee. The devotees are also described as positive, comparative and superlative, in terms of their love and attachment for Kṛṣṇa.
It should be understood that a madhyama-adhikārī, a second-class devotee, is fully convinced of Kṛṣṇa consciousness but cannot support his convictions with śāstric reference. A neophyte may fall down by associating with nondevotees because he is not firmly convinced and strongly situated. The second-class devotee, even though he cannot support his position with śāstric reference, can gradually become first-class devotee by studying the śāstras and associating with a first-class devotee. However, if the second-class devotee does not advance himself by associating with a first-class devotee, he makes no progress. There is no possibility that a first-class devotee will fall down, even though he may mix with nondevotees to preach. Conviction and faith gradually increase to make one an uttama-adhikārī, a first-class devotee.
Madhya 23.72--” ‘A person advanced in devotional service sees within everything the soul of souls, the Supreme Personality of Godhead, Śrī Kṛṣṇa. Consequently he always sees the form of the Supreme Personality of Godhead as the cause of all causes and understands that all things are situated in Him.
Madhya 22.74-” ‘A prākṛta, or materialistic devotee does not purposefully study the śāstra and try to understand the actual standard of pure devotional service. 

Consequently he does not show proper respect to advanced devotees. He may, however, follow the regulative principles learned from his spiritual master or from his family who worships the Deity. He is to be considered on the material platform, although he is trying to advance in devotional service. Such a person is a bhakta-prāya [neophyte devotee], or bhaktābhāsa, for he is a little enlightened by Vaiṣṇava philosophy.’
Madhya 22.78-80--“Devotees are always merciful, humble, truthful, equal to all, faultless, magnanimous, mild and clean. They are without material possessions, and they perform welfare work for everyone. They are peaceful, surrendered to Kṛṣṇa and desireless. They are indifferent to material acquisitions and are fixed in devotional service. They completely control the six bad qualities-lust, anger, greed and so forth. They eat only as much as required, and they are not inebriated. They are respectful, grave, compassionate and without false prestige. They are friendly, poetic, expert and silent.
Madhya 22.81–” ‘Devotees are always tolerant, forebearing and very merciful. They are the well-wishers of every living entity. They follow the scriptural injunctions, and because they have no enemies, they are very peaceful. These are the decorations of devotees.’
PURPORT-This is a quotation from Śrīmad-Bhāgavatam (3.25.21). When the sages, headed by Śaunaka, inquired about Kapiladeva, the incarnation of Godhead, Suta Gosvāmī, who was the topmost devotee of the Lord, quoted talks about self-realization between Maitreya, a friend of Vyāsadeva, and Vidura. It was then that the topic of Lord Kapila came up and His discussions with His mother, wherein He stated that attachment to material things is the cause of conditional life. When a person becomes attached to transcendental things, he is on the path of liberation.
Madhya 22.83–The root cause of devotional service to Lord Kṛṣṇa is association with advanced devotees. Even when one’s dormant love for Kṛṣṇa awakens, association with devotees is still most essential.
Madhya 22.87–“A Vaiṣṇava should always avoid the association of ordinary people. Common people are very much materially attached, especially to women. Vaiṣṇavas should also avoid the company of those who are not devotees of Lord Kṛṣṇa.
Madhya 22.88-90–” ‘By association with worldly people, one becomes devoid of truthfulness, cleanliness, mercy, gravity, spiritual intelligence, shyness, austerity, fame, forgiveness, control of the mind, control of the senses, fortune and all opportunities. One should not at any time associate with a coarse fool who is bereft of the knowledge of self-realization and who is no more than a toy animal in the hands of a woman. The illusion and bondage that accrue to a man from attachment to any other object are not as complete as that resulting from association with a woman or with men too attached to women.’
 
Some Conclusions—Srila Prabhupada makes it very clear in the above verses and purports the very high standard of devotion a pure devotee has, and that he will never fall down even if he preaches among the most fallen souls This has been an on going false point made by iskcon that their “gurus” have only fallen due to their preaching amongst the inmates of kali yuga. This is a lie just like the governments of the world have lied to everyone that taking the vaccine will solve your medical problems when it will only make it worse.
Also it is stated the qualities of neophytes and intermediate devotees and one difference being that the neophytes do not make a purposeful study of the Sastra which keeps them in ignorance and as a result they makes all sorts of offenses against those who DO study the sastra, what to speak of their own guru , Srila Prabhupada
Hare Krsna
damaghosa das