Prākṛta-bhakta means he's situated on the material platform, but under the direction of spiritual master, under the direction of the śāstras, he's trying to improve his condition of material existence.
The Bhāgavata says that any person who is misidentifying himself with this body, kuṇape tri-dhātuke... Yasya ātma-buddhiḥ. This body is made of three dhātus, kapha pitta vāyu, and if we identify that "I, I am kapha pitta vāyu," then certainly he's a go-kharaḥ. He's nothing more than a cow and an ass. So bhakti, devotional service begins when one is actually self-realized. Before that, sa bhaktaḥ prākṛtaḥ smṛtaḥ. Anyone who has got the identification of this body, he is engaged in Deity worship, but he does not actually realize his self, he does not know who is a devotee, and he does not know his duty to other persons, he remains a prākṛta-bhakta. Prākṛta-bhakta means he's situated on the material platform, but under the direction of spiritual master, under the direction of the śāstras, he's trying to improve his condition of material existence. That is called prākṛta-bhakta, sa bhaktaḥ prākṛtaḥ smṛtaḥ.
So we should not remain perpetually a prākṛta bhakta. We must improve, madhyama-bhakta. Madhyama-bhakta means he knows what is God, what is Kṛṣṇa. He knows what is Kṛṣṇa's devotee. He knows the people in general, and he knows the atheistic persons. Four categories of persons manifest before him. It is not that the... Artificially, if we say that "In my view, everyone is the same..." That is, of course, higher stage. Paṇḍitāḥ sama-darśinaḥ (BG 5.18). But we should not imitate that stage. Because we are in the neophyte stage, we should not imitate the vision of mahā-bhāgavata. Mahā-bhāgavata does not see anyone nondevotee. He sees everyone better devotee than himself. Just like Kṛṣṇadāsa Kavirāja Gosvāmī.