SB 11.20.27-28

jāta-śraddho mat-kathāsu
 nirviṇṇaḥ sarva-karmasu
veda duḥkhātmakān kāmān
 parityāge ’py anīśvaraḥ
tato bhajeta māṁ prītaḥ
 śraddhālur dṛḍha-niścayaḥ
juṣamāṇaś ca tān kāmān
 duḥkhodarkāṁś ca garhayan
Word for word: 
jāta — one who has awakened; śraddhaḥ — faith; mat-kathāsu — in the descriptions of My glories; nirviṇṇaḥ — disgusted; sarva — with all; karmasu — activities; veda — he knows; duḥkha — misery; ātmakān — constituted of; kāmān — all types of sense gratification; parityāge — in the process of renouncing; api — although; anīśvaraḥ — unable; tataḥ — due to such faith; bhajeta — he should worship; mām — Me; prītaḥ — remaining happy; śraddhāluḥ — being faithful; dṛḍha — resolute; niścayaḥ — conviction; juṣamāṇaḥ — engaging in; ca — also; tān — that; kāmān — sense gratification; duḥkha — misery; udarkān — leading to; ca — also; garhayan — repenting of.
Translation: 
Having awakened faith in the narrations of My glories, being disgusted with all material activities, knowing that all sense gratification leads to misery, but still being unable to renounce all sense enjoyment, My devotee should remain happy and worship Me with great faith and conviction. Even though he is sometimes engaged in sense enjoyment, My devotee knows that all sense gratification leads to a miserable result, and he sincerely repents such activities.
Purport: 

The beginning stage of pure devotional service is described here by the Lord. A sincere devotee has practically seen that all material activities lead only to sense gratification and all sense gratification leads only to misery. Thus a devotee’s sincere desire is to engage twenty-four hours a day in the loving service of Lord Kṛṣṇa without any personal motivation. The devotee sincerely desires to be established in his constitutional position as the Lord’s eternal servitor, and he prays to the Lord to elevate him to this exalted position. The word anīśvara indicates that because of one’s past sinful activities and bad habits one may not immediately be able to completely extinguish the enjoying spirit. The Lord here encourages such a devotee not to be overly depressed or morose but to remain enthusiastic and to go on with his loving service. The word nirviṇṇa indicates that a sincere devotee, although somewhat entangled in the remnants of sense gratification, is completely disgusted with material life and under no circumstances willingly commits sinful activities. In fact, he avoids every kind of materialistic activity. The word kāmān basically refers to sex attraction and its by-products in the form of children, home and so forth. Within the material world, the sex impulse is so strong that even a sincere candidate in the loving service of the Lord may sometimes be disturbed by sex attraction or by lingering sentiments for wife and children. A pure devotee certainly feels spiritual affection for all living entities, including the so-called wife and children, but he knows that material bodily attraction leads to no good, for it simply entangles one and one’s so-called relatives in a miserable chain reaction of fruitive activities. The word dṛḍha-niścaya (“steadfast conviction”) indicates that in any circumstance a devotee is completely determined to go on with his prescribed duties for Kṛṣṇa. Thus he thinks, “By my previous shameful life my heart is polluted with many illusory attachments. Personally I have no power to stop them. Only Lord Kṛṣṇa within my heart can remove such inauspicious contamination. But whether the Lord removes such attachments immediately or lets me go on being afflicted by them, I will never give up my devotional service to Him. Even if the Lord places millions of obstacles in my path, and even if because of my offenses I go to hell, I will never for a moment stop serving Lord Kṛṣṇa. I am not interested in mental speculation and fruitive activities; even if Lord Brahmā personally comes before me offering such engagements, I will not be even slightly interested. Although I am attached to material things I can see very clearly that they lead to no good because they simply give me trouble and disturb my devotional service to the Lord. Therefore, I sincerely repent my foolish attachments to so many material things, and I am patiently awaiting Lord Kṛṣṇa’s mercy.”

The word prīta indicates that a devotee feels exactly like the son or subject of the Supreme Personality of Godhead and is very attached to his relationship with the Lord. Therefore, although sincerely lamenting occasional lapses into sense enjoyment, he never gives up his enthusiasm to serve Lord Kṛṣṇa. If a devotee becomes too morose or discouraged in devotional service, he may drift into an impersonal consciousness or give up his devotional service to the Lord. Therefore, the Lord here advises that although one should sincerely repent, he should not become chronically depressed. One should understand that because of his past sins he must occasionally suffer disturbances from the material mind and senses, but one should not therefore become a devotee of detachment, as do the speculative philosophers. Although one may desire detachment to purify one’s devotional service to the Lord, if one becomes more concerned with renunciation than with acting for the pleasure of Lord Kṛṣṇa, he is misunderstanding the position of loving devotional service. Faith in Lord Kṛṣṇa is so powerful that in due course of time it will automatically award detachment and perfect knowledge. If one gives up Lord Kṛṣṇa as the central object of one’s worship and concentrates more on knowledge and detachment, one will become deviated from one’s progress in going back home, back to Godhead. A sincere devotee of the Lord must be sincerely convinced that simply by the strength of devotional service and the mercy of Lord Kṛṣṇa he will achieve everything auspicious in life. One must believe that Lord Kṛṣṇa is all-merciful and that He is the only real goal of one’s life. Such determined faith combined with a sincere desire to give up sense enjoyment will carry one past the obstacles of this world.

The words jāta-śraddhaḥ mat-kathāsu are most significant here. By faithful hearing of the mercy and glories of the Lord one will gradually be freed from all material desire and clearly see at every moment the utter frustration of sense gratification. Chanting the glories of the Lord with firm faith and conviction is a tremendously powerful spiritual process that enables one to give up all material association.

There is actually nothing inauspicious in the devotional service of the Lord. Occasional difficulties experienced by a devotee are due to his previous material activities. On the other hand, the endeavor for sense gratification is completely inauspicious. Thus sense gratification and devotional service are directly opposed to each other. In all circumstances one should therefore remain the Lord’s sincere servant, always believing in His mercy. Then one will certainly go back home, back to Godhead.