Because you are not able to offer such gigantic food to Kṛṣṇa, Kṛṣṇa says: "All right, give Me patraṁ puṣpaṁ phalaṁ toyam. Give Me a little flower, give Me a little fruit, give Me a little water, I shall accept it." This is called arcana-viddhi. Kṛṣṇa has agreed to accept your service as you can afford to do. It is not idol worship. It is actually worshiping Kṛṣṇa.
So therefore Kṛṣṇa said, mayy āsakta-manāḥ pārtha, that simply you have to increase your attachment for Kṛṣṇa. This is bhakti-yoga. We have got attachment for so many things. Our attachment is now disbursed in so many ways. You have to concentrate that attachment to Kṛṣṇa, then your business will be successful, bhakti-yoga, mayy āsakta-manāḥ, "Mine." Sa vai manaḥ kṛṣṇa-pādāravindayor. Somehow or other you have to engage your mind at the lotus feet of Kṛṣṇa. Therefore so many paraphernalia how to engage your mind. Śravaṇaṁ kīrtanaṁ viṣṇoḥ: hearing about Kṛṣṇa, chanting about Kṛṣṇa, thinking of Kṛṣṇa, worshiping Kṛṣṇa, talking about Kṛṣṇa, writing about Kṛṣṇa, selling the books about Kṛṣṇa, eating Kṛṣṇa prasādam. In this way you become Kṛṣṇa-ized. All-around Kṛṣṇa. That is Kṛṣṇa consciousness. This is called bhakti-yoga. This is called bhakti. Somehow or other, you become surrounded by Kṛṣṇa atmosphere. This is Kṛṣṇa consciousness. Mayy āsakta-manāḥ pārtha yogaṁ yuñjan, this is yoga; mad-āśrayaḥ, not . . . mad-āśrayaḥ means "taking shelter of Me." So, "taking shelter of Me" through beginning teaching. Understanding of Kṛṣṇa, taking shelter of Kṛṣṇa's representative. Guru-kṛṣṇa-kṛpāya pāya bhakti-latā-bīja (CC Madhya 19.151). By Kṛṣṇa's mercy one gets guru, and guru's mercy one gets Kṛṣṇa.