A neophyte considers the arcā-vigraha (the statue of the Lord) to be different from the original Personality of Godhead; he considers it a representation of the Supreme Lord in the form of a Deity. But an advanced devotee accepts the Deity in the temple as the Supreme Personality of Godhead. He does not see any difference between the original form of the Lord and the statue, or arcā form of the Lord, in the temple. This is the vision of a devotee whose devotional service is in the highest stage of bhāva, or love of Godhead, whereas a neophyte's worship in the temple is a matter of routine duty.
(Srimad Bhagavatam----3:29:16----purport).

A devotee should try to understand everything in relationship with Kṛṣṇa and try to serve everything in that spirit. To serve everything means to engage everything in the service of Kṛṣṇa. If a person is innocent and does not know his relationship with Kṛṣṇa, an advanced devotee should try to engage him in the service of Kṛṣṇa. One who is advanced in Kṛṣṇa consciousness can engage not only the living being but everything in the service of Kṛṣṇa.
(Srimad Bhagavatam----3:29:21----purport).

The significance of advancement in transcendental knowledge and detachment from material attraction is exhibited in the personality of a highly advanced devotee. For him there is nothing agreeable or disagreeable because he does not act in any way for his personal sense gratification. Whatever he does, whatever he thinks, is for the satisfaction of the Personality of Godhead. Either in the material world or in the spiritual world, his equipoised mind is completely manifested. He can understand that in the material world there is nothing good; everything is bad due to its being contaminated by material nature. The materialists conclusions of good and bad, moral and immoral, etc., are simply mental concoction or sentiment. Actually there is nothing good in the material world. In the spiritual field everything is absolutely good. There is no inebriety in the spiritual varieties. Because a devotee accepts everything in spiritual vision, he is equipoised; that is the symptom of his being elevated to the transcendental position. He automatically attains detachment, vairāgya, then jñāna, knowledge, and then actual transcendental knowledge. The conclusion is that an advanced devotee dovetails himself in the transcendental qualities of the Lord, and in that sense he becomes qualitatively one with th Supreme Personality of Godhead.
(Srimad Bhagavatam----3:32:24----purport).

People in general, who are under the influence of avidyā-śakti, or māyā, have neither knowledge nor devotion. But when a person who is a little advanced and is therefore called a jñānī advances even more, he is in the category of a jñāna-miśra-bhakta, or a devotee whose love is mixed with empiric knowledge. When he is still further advanced, he can realize that the Absolute Truth is a person with multienergies. An advanced devotee can understand the Lord and His creative energy.
(Srimad Bhagavatam----4:9:16----purport).

It is advised that an advanced devotee should be tolerant; he should show complete mercy to persons who are ignorant or innocent. A preacher-devotee is meant to show mercy to innocent persons, whom he can elevate to devotional service. Everyone, by constitutional position, is an eternal servant of God. Therefore, a devotee's business is to awaken everyone's Kṛṣṇa consciousness. That is his mercy.
(Srimad Bhagavatam----4:11:13----purport).

A devotee should always aspire to engage in the service of advanced devotees. As Śrīla Narottama dāsa Ṭhākura has sung:
tāṅdera caraṇa sevi bhakta-sane vāsa
janame janame haya, ei abhilāṣa
A devotee should always aspire to live in the association of advanced devotees and engage in the service of the Lord through the paramparā system.
(Srimad Bhagavatam----6:15:18-19----purport).

A very advanced devotee in Kṛṣṇa consciousness does not want riches, followers or possessions. Rāyaḥ kalatraṁ paśavaḥ sutādayo gṛhā mahī kuñjara-kośa-bhūtayaḥ. The satisfaction of possessing material opulences, although perhaps of a different standard, is available even in the lives of dogs and hogs, who cannot revive their eternal relationship with Kṛṣṇa. In human life, however, our eternal, dormant relationship with Kṛṣṇa is possible to revive. Therefore Prahlāda Mahārāja has described this life as arthadam.
(Srimad Bhagavatam----7:7:39----purport).

An advanced devotee consequently does not distinguish between happiness and distress. As stated in Śrīmad-Bhāgavatam (10.14.8):
tat te 'nukampāṁ susamīkṣamāṇo
bhuñjāna evātma-kṛtaṁ vipākam
When a devotee is in a condition of so-called distress, he considers it a gift or blessing from the Supreme Personality of Godhead. When a devotee is always thus situated in Kṛṣṇa consciousness in any condition of life, he is described as mukti-pade sa dāya-bhāk, a perfect candidate for returning home, back to Godhead.
(Srimad Bhagavatam----7:9:31----purport).

Kṛṣṇa can become the director and spiritual master of anyone who is serious about getting the mercy of Kṛṣṇa. The Lord sends the spiritual master to train a devotee, and when the devotee is advanced, the Lord acts as the spiritual master within his heart.
teṣāṁ satata-yuktānāṁ
bhajatāṁ prīti-pūrvakam
dadāmi buddhi-yogaṁ taṁ
yena mām upayānti te
[Bg. 10.10]
"To those who are constantly devoted and worship Me with love, I give the understanding by which they can come to Me." Kṛṣṇa does not become the direct spiritual master unless one is fully trained by His representative spiritual master. Therefore, as we have already discussed, the Lord's representative spiritual master should not be considered an ordinary human being. The representative spiritual master never gives any false knowledge to his disciple, but only perfect knowledge. Thus he is the representative of Kṛṣṇa. Kṛṣṇa helps as the guru, or spiritual master, from within and from without. From without He helps the devotee as His representative, and from within He talks personally with the pure devotee and gives him instructions by which he may return home, back to Godhead.
(Srimad Bhagavatam----7:15:76----purport).

When one is Kṛṣṇa conscious, he gets more and more happiness by discharging duties for Kṛṣṇa. Such a person spits on sense gratification, especially that of sexual enjoyment. An experienced, advanced devotee is no longer interested in sex life. The strong desire for sex can be subdued only by advancement in Kṛṣṇa consciousness.
(Srimad Bhagavatam----9:19:16----purport).