This is the difference, bhakti and karma. Karma means to fulfill my desires, and bhakti means to fulfill Kṛṣṇa's desires. That is the difference. Now you make your choice, whether you want to make your desires fulfilled or if you want to make Kṛṣṇa's desire fulfilled. If you make your decision to make Kṛṣṇa's desire fulfilled, then your life is successful. That is our Kṛṣṇa conscious life. "Kṛṣṇa wants it; I must do it. I will not do anything for me." That is Vṛndāvana. All the inhabitants of Vṛndāvana, they are trying to fulfill Kṛṣṇa's desire. The cowherds boys, the calves, the cows, the trees, the flowers, the water, the gopīs, the elderly inhabitants, Mother Yaśodā, Nanda—they are all engaged in fulfilling Kṛṣṇa's desire. That is Vṛndāvana. So you can turn this material world into Vṛndāvana, provided you agree to fulfill the desires of Kṛṣṇa. That is Vṛndāvana. And if you want to fulfill your own desires, that is material. This is the difference between material and spiritual.
The same thing, this house. This house is a house. The next door is a karmī's house, and this house is a temple. What is the difference? The difference is: in this house everyone is engaged to fulfill Kṛṣṇa's desire, and the other house, everyone is engaged in fulfilling his own desire. Therefore it is temple, and that is house. Otherwise, from the external feature, where is the difference? The same stone, the same wood, the same plant, the same land, the same kitchen—everything is same, and the business is the same. But here the business is to satisfy Kṛṣṇa, and the other houses, the business is to satisfy one's own senses. That is the difference between kāma and prema. When you try to fulfill the desires of Kṛṣṇa, that is prema. And when you want to fulfill your own desires, that is called kāma. There is no other.