The, every living being is trying to lord it over the material nature. That is his disease. He wants to lord it. He's servant, but artificially, he wants to become Lord. That is the disease. Everyone... Ultimately, when he fails to lord it over the material world, he says, "Oh, this material world is false. Now I shall become one with the Supreme." Brahma satyaṁ jagan mithyā. But because the spirit soul is part and parcel of Kṛṣṇa, so by nature, he is joyful. He is seeking after joy. Every one of us, we are working so hard to find out some pleasure of life.
So that pleasure of life cannot be had in the spiritual effulgence. Therefore in the Śrīmad-Bhāgavatam we get this information that āruhya kṛcchreṇa paraṁ padam (SB 10.2.32). Kṛcchreṇa, after undergoing severe austerity and penance, one may merge into the Brahman effulgence... Sāyujya-mukti. It is called sāyujya-mukti. Sāyujya, to merge. So āruhya kṛcchreṇa paraṁ padam. Even one goes up to that point, to merge into the Brahman existence after severe austerity and penances, still, they fall down. Patanty adhaḥ. Adhaḥ means again comes into this material world. Āruhya kṛcchreṇa paraṁ padaṁ tataḥ patanty adhaḥ (SB 10.2.32). Why they fall down? Anādṛta-yuṣmad-aṅghrayaḥ. They'll never agree God is person. They'll never agree. Their teeny brain cannot accommodate that God, the Supreme, can be a person. Because he has experience of the person of himself, or others. If God is a person like me and you, then how He can create universe, innumerable universes?
Therefore to understand the Supreme Personality of Godhead, it requires enough pious activities. In Bhagavad-gītā it is said, bahūnāṁ janmanām ante (BG 7.19). After speculating in the impersonal philosophical way, when one is mature, bahūnāṁ janmanām ante jñānavān, when he's actually wise,... So long he cannot understand that the Supreme Absolute Truth is person, sac-cid-ānanda-vigraha... (Bs. 5.1). brahmeti paramātmeti bhagavān iti śabdyate. Bhagavān. That... vadanti tat tattva-vidas tattvaṁ yaj jñānam advayam (SB 1.2.11). This is statement in the Śrīmad-Bhāgavata: "Those who know the Absolute Truth, they know that Brahman, Paramātmā and Bhagavān, they are one. It is different phases of understanding only." Just like if you see one hill from a distant place, you will find impersonal, hazy, something cloudy. If you go still forward, then you can see it is something greenish. And if you go actually within the hill, you'll see there are so many animals, trees, men. Similarly, those who are trying to understand the Absolute from distance place or far away, they are realizing, by speculation, impersonal Brahman. Those who are still forward, yogis, they can see localized aspect. Dhyānāvasthita-tad-gatena manasā paśyanti yaṁ yoginaḥ (SB 12.13.1). They can see, dhyāna avasthita, localized within himself. This is Paramātmā feature. And those who are devotees, they see Kṛṣṇa, the Supreme Personality of God, eye to eye, one person to another. Nityo nityānāṁ cetanaś cetanānām (Kaṭha Upaniṣad 2.2.13).