The word dṛśy-ādibhiḥ is significant. According to Jīva Gosvāmī, dṛśi means jñāna, philosophical research. By different processes of philosophical research under different concepts, such as the process of jñāna-yoga, the same Bhagavān, or Supreme Personality of Godhead, is understood as impersonal Brahman. Similarly, by the eightfold yoga system He appears as the Paramātmā. But in pure Kṛṣṇa consciousness, or knowledge in purity, when one tries to understand the Absolute Truth, one realizes Him as the Supreme Person. The Transcendence is realized simply on the basis of knowledge. The words used here, paramātmeśvaraḥ pumān, are all transcendental, and they refer to Supersoul. Supersoul is also described as puruṣa, but the word Bhagavān directly refers to the Supreme Personality of Godhead, who is full of six opulences: wealth, fame, strength, beauty, knowledge and renunciation. He is the Personality of Godhead in different spiritual skies. The various descriptions of paramātmā, īśvara and pumān indicate that the expansions of the Supreme Godhead are unlimited.
Ultimately, to understand the Supreme Personality of Godhead one has to accept bhakti-yoga. By executing jñāna-yoga or dhyāna-yoga one has to eventually approach the bhakti-yoga platform, and then Paramātmā, īśvara, pumān, etc., are all clearly understood. It is recommended in the Second Canto of Śrīmad-Bhāgavatam that whether one is a devotee or fruitive actor or liberationist, if he is intelligent enough he should engage himself with all seriousness in the process of devotional service. It is also explained that whatever one desires which is obtainable by fruitive activities, even if one wants to be elevated to higher planets, can be achieved simply by execution of devotional service. Since the Supreme Lord is full in six opulences, He can bestow any one of them upon the worshiper.
The one Supreme Personality of Godhead reveals Himself to different thinkers as the Supreme person or impersonal Brahman or Paramātmā. Impersonalists merge into the impersonal Brahman, but that is not achieved by worshiping the impersonal Brahman. If one takes to devotional service and at the same time desires to merge into the existence of the Supreme Lord, he can achieve that. If someone desires at all to merge into the existence of the Supreme, he has to execute devotional service.