Śuddha-bhakti, the activity of the soul proper—in other words, engagement in the transcendental loving service of the Lord—is performed in a liberated condition. In Bhagavad-gītā (14.26) it is stated:
māṁ ca yo 'vyabhicāreṇa
bhakti-yogena sevate
sa guṇān samatītyaitān
brahma-bhūyāya kalpate
"One who engages in full devotional service, who does not fall down in any circumstance, at once transcends the modes of material nature and thus comes to the level of Brahman."
Avyabhicāriṇī bhakti means unalloyed devotion. A person engaged in devotional service must be free from material motives. In this Kṛṣṇa consciousness movement, one's consciousness must be changed. If consciousness is aimed toward material enjoyment, it is material consciousness, and if it is aimed toward serving Kṛṣṇa, it is Kṛṣṇa consciousness.
(Netar of Instruction).

Just like Bilvamaṅgala Ṭhākura. I think I have several times spoken about Bilvamaṅgala Ṭhākura. So Bilvamaṅgala Ṭhākura, he raised himself in his previous life to the bhāva-bhakti. Bhāva-bhakti means always feeling for Kṛṣṇa. That is the prior stage of loving Kṛṣṇa, bhāva-bhakti. So he, in his previous life he was raised, but somehow or other, he fell down. But it is assured, śucīnāṁ śrīmatāṁ gehe yoga-bhraṣṭo 'bhijāyate: [Bg. 6.41] "Even such Kṛṣṇa consciousness person falls down, he is given chance to take birth in nice brāhmaṇa family or śuci, pure family, and rich family." So Bilvamaṅgala Ṭhākura was very rich man. He was born in a very rich brāhmaṇa family. And he was addicted to prostitute. By some way or other, he had some inclination like that. So he could not finish Kṛṣṇa consciousness. He fallen down. But at a opportune moment he got again the Kṛṣṇa consciousness. How is that? The incidence is that he was performing the śrāddha ceremony of his father, but he had a girlfriend, prostitute. So he wanted to go there very quickly. So somehow or other he finished. And he wanted to go there. But on the road he found that it was very heavily raining and he had to cross the river. So he did everything. And he... The prostitute was... She thought that "Bilvamaṅgala is not coming today. It is very..., so much raining." So when she saw that Bilvamaṅgala is at the door, she was astonished. She said, "Bilvamaṅgala, how did you come here in this rainy, torrents of rainy...?" So he disclosed everything that how he catched one dead body in the river, then he crossed the river, then he jumped over the wall. So she was astonished, and she simply said, "Oh, this much affection if you would have with Kṛṣṇa, how you would have been... Your life would have been nice." Immediately it was... "Oh, Kṛṣṇa...?" Immediately, he left everything. Immediately he left everything and went to Vṛndāvana. He is... So Kṛṣṇa is so nice. Just at the right point He will remind. Yatate ca tataḥ. Here, in the Bhagavad-gītā, yatate ca tato bhūyaḥ saṁsiddhau kuru-nandana, pūrvābhyāsena. He was accustomed, so immediately reminded, immediately.
(Srimad Bhagavatam lecture--1:5:18--New Vrindavana--22nd. June, 1969).