A bhakta feels ashamed to ask from Kṛṣṇa for his material comforts. Just like Prahlāda Mahārāja. Prahlāda Mahārāja, when he was offered by Nṛsiṁha-deva, "Now you ask from Me whatever you want," so Prahlāda Mahārāja became surprised. He said: "My dear Sir, I am not a mercantile man. We are in the modes of passion, and You are offering me all kinds of benediction. I can ask You. But do You mean to say that I served You in expectation of some return? No, no. Don't induce me in this way." This is śuddha-bhakta. Śuddha-bhakta never gives trouble to Kṛṣṇa for his personal benefit. They are called akāma. And sarva-kāma means karmīs, ordinary. They are working hard to get some result, good result for sense gratification. They are called sarva-kāma. And there is no limit of their desires. Just like this Durgā Pūjā, they'll want dhanaṁ dehi rūpaṁ dehi rūpavatī-bhāryāṁ dehi yaśo dehi, this dehi, that dehi, dehi, dehi . . . there is no limit how much they are asking. Therefore they are called sarva-kāma. You go on supplying a karmī, he'll never be satisfied. "More, more, more." You go to so many businessmen—they have got crores and lakhs—but if you want to talk something about Kṛṣṇa, they have no time, "Please take your money, contribution. Let us do business." Because their kāma is never satisfied. Therefore sarva-kāma. And another is mokṣa-kāma. Mokṣa-kāma means when they could not fulfill all the desires in this material world, they, at that time, want to become one with God that, "If I become God, then my all desires will be fulfilled." That is called mokṣa-kāma.
So śāstra recommends that either you belong to the group of akāma or to the group of sarva-kāma or to the group of mokṣa-kāma, tīvreṇa bhakti-yogena yajeta paramaṁ puruṣa (SB 2.3.10), you worship very seriously paramaṁ puruṣa. Paramaṁ puruṣa means Kṛṣṇa. Bhakti-yogena. Kṛṣṇa cannot be worshiped by any other yoga system except bhakti-yoga. Kṛṣṇa says in the Bhagavad-gītā, bhaktyā mām abhijānāti (BG 18.55). If you want to know Kṛṣṇa, it is not possible to any other means. There are many other means—karma, yoga, jñāna and bhakti—but if you want to know Kṛṣṇa, then you have to take the bhakti-yoga, no other. Neither . . . Kṛṣṇa never said that "By jñāna, by cultivation of knowledge, one can understand Me." They can do so. That is also stated in the Bhagavad-gītā. By cultivation of knowledge, after many, many births, if that person, searching out the Absolute Truth by cultivation of knowledge, if he comes in contact with a devotee, then he gets the chance of understanding what is Kṛṣṇa.