Ghost means no material gross life, but the mental . . . material subtle life is there. A ghost is carried by the subtle body: mind, intelligence and false ego. And one who gets a body, gross body . . . upon this mind, intelligence and ego, one develops a gross body of five elements: earth, water, air, fire. This is the two kinds of body, a condition. And when he's actually Kṛṣṇa conscious, he's transcendental to this gross and subtle body. He attains a spiritual body, which is never to be finished—eternal, blissful life.
So sometimes, when Kṛṣṇa, He's especially kind to a person who thinks that, "By . . . I shall execute Kṛṣṇa consciousness; at the same time, I shall enjoy this material life." This is foolishness. This is foolishness. If you want Kṛṣṇa—go to home, back to home, back to Godhead—then you have to finish your material desires. Because Kṛṣṇa is so kind that even if you have a pinch of material desire to enjoy in this material world, He will give you a chance, "All right, you do it." That means we become entangled.
Therefore, those who are executing Kṛṣṇa consciousness, they should try to become free from all material desires. Anyābhilāṣitā-śūnyaṁ jñāna-karmādy-anāvṛtam (Brs. 1.1.11). Jñāna means knowledge. Or the jñānīs, they also want to be become one with the Supreme. And karma . . . karma means karmīs, those who want to enjoy.
So one should be uncovered, not covered by this jñāna, by karma or by any material desires. Anyābhilāṣitā-śūnyaṁ jñāna-karmādy-anāvṛtam, ānukūlyena kṛṣṇānuśīlanam (CC Madhya 19.167). Simply favorably serving Kṛṣṇa. Favorably, not unfavorably. Consciousness favorably.
Just like Kaṁsa. Kaṁsa was also Kṛṣṇa conscious, but he was simply planning how to kill Kṛṣṇa. That kind of Kṛṣṇa consciousness is not good. Of course, Kṛṣṇa is so kind, so any way one becomes Kṛṣṇa conscious, he gets the benefit, at least, of liberation. Just like Kaṁsa was liberated. Although he was unfavorably Kṛṣṇa conscious, but he was thinking of Kṛṣṇa. Hiraṇyakaśipu, he was also thinking of Kṛṣṇa, but unfavorably. So that is not bhakti. We must think of Kṛṣṇa favorably. And that is bhakti. Ānukūlyena kṛṣṇānuśīlanam. Culture of Kṛṣṇa consciousness favorably. Bhaktir uttamā, that is pure bhakti.
So a person who is thinking of Kṛṣṇa haphazardly, namely that, "By executing Kṛṣṇa consciousness, I'll be materially happy," he can be materially happy, because, as Śukadeva Gosvāmī said, akāmaḥ sarva-kāmo vā mokṣa-kāma udāra-dhīḥ (SB 2.3.10): his desires will be fulfilled.
Just like Dhruva Mahārāja: he went to worship Kṛṣṇa in the forest with material desires that, "I may get the kingdom of my father or better kingdom." That was his determination. So he got it. But when he got it . . . by executing Kṛṣṇa consciousness, he was intelligent. He was very sorry that, "What I have asked? This material happiness I have asked . . ."
So when he actually saw Kṛṣṇa, Viṣṇu, he was offered, "Now you take benediction as you desire." He was very sorry. He said: "My Lord, I have no other desire now. I have finished all my desire." Anyābhi . . . svāmin kṛtārtho 'smi varaṁ na yāce (CC Madhya 22.42): "I don't want any this, any kind of benediction. I have got You. I have more necessity of any benediction."