Srila Prabhupada- The younger brother of desire is anger. If one’s desire is not fulfilled, the younger brother, anger, follows. Here we can mark that even great saintly persons like the Kumāras were also angry, but they were not angry for their personal interests. They were angry because they were forbidden to enter the palace to see the Personality of Godhead. Therefore the theory that in the perfectional stage one should not have anger is not supported in this verse. Anger will continue even in the liberated stage. These four mendicant brothers, the Kumāras, were considered liberated persons, but still they were angry because they were restricted in their service to the Lord. The difference between the anger of an ordinary person and that of a liberated person is that an ordinary person becomes angry because his sense desires are not being fulfilled, whereas a liberated person like the Kumāras becomes angry when restricted in the discharge of duties for serving the Supreme Personality of Godhead.

(SB 3.15.31p)

Srila Prabhupada- For a conditioned soul, therefore, it is very important to hear from the mouth of a pure devotee, who is fully surrendered to the lotus feet of the Lord without any material desire, speculative knowledge or contamination of the modes of material nature. Every one of us is kuyogī because we have engaged in the service of this material world, forgetting our eternal relationship with the Lord as His eternal loving servants. It is our duty to rise from the kuyoga platform to become suyogīs, perfect mystics.

(SB 4.20.25p)

Srila Prabhupada- “You will be judged after your death, every one of us. Of course, if he takes Kṛṣṇa consciousness seriously, then the path is automatic. Automatically you go back to home, back to Godhead. There is no question of judgment. Judgment is for the criminals, the rascals who are not Kṛṣṇa conscious. But if you become Kṛṣṇa conscious, even if you cannot finish the job in this life, even if you fall, still, you will be given another chance of human body, to begin where you ended, to begin from the point where you fell down.”

(Lecture — January 5, 1974, Los Angeles)

Srila Prabhupada- Śrī Caitanya Mahāprabhu also said:

na dhanaṁ na janaṁ na sundarīṁ
kavitāṁ vā jagadīśa kāmaye
mama janmani janmanīśvare
bhavatād bhaktir ahaitukyī tvayi

“O Lord of the universe, I do not desire material wealth, materialistic followers, a beautiful wife or fruitive activities described in flowery language. All I want, life after life, is unmotivated devotional service to You.” (Śikṣāṣṭaka 4)

By saying “life after life” (janmani janmani), the Lord referred not to an ordinary birth but a birth in which to remember the lotus feet of the Lord. Such a body is desirable. A devotee does not think like yogīs and jñānīs, who want to refuse a material body and become one with the impersonal Brahman effulgence. A devotee does not like this idea. On the contrary, he will accept any body, material or spiritual, for he wants to serve the Lord. This is real liberation.

(SB 9.13.9p)

Srila Prabhupada- He ( a devotee) should also make friendship with persons who are on an equal level with himself or who have the same understanding that he does. For a devotee, there is no point in making friendships with ordinary persons; he should make friendship with other devotees so that by discussing among themselves, they may elevate one another on the path of spiritual understanding. This is called iṣṭa-goṣṭhī.

(SB 3.29.17p)

Srila Prabhupada- If a disciple is very serious to execute the mission of the spiritual master, he immediately associates with the Supreme Personality of Godhead by vāṇī or vapuḥ . This is the only secret of success in seeing the Supreme Personality of Godhead. Instead of being eager to see the Lord in some bush of Vṛndāvana while at the same time engaging in sense gratification, if one instead sticks to the principle of following the words of the spiritual master, he will see the Supreme Lord without difficulty.

(SB 4.8.51p)

Srila Prabhupada- A devotee should also be compassionate to the poor. This does not refer to those who are poverty-stricken materially. According to devotional vision, a man is poor if he is not in Kṛṣṇa consciousness. A man may be very rich materially, but if he is not Kṛṣṇa conscious, he is considered poor. On the other hand, many ācāryas, such as Rūpa Gosvāmī and Sanātana Gosvāmī, used to live beneath trees every night. Superficially it appeared that they were poverty-stricken, but from their writings we can understand that in spiritual life they were the richest personalities.

(SB 3.29.17p)