Prabhupāda: I have already explained that anything which is not utilized for Kṛṣṇa, that is material. Either you are vegetarian or not vegetarian, it doesn't matter. If it is not utilized for Kṛṣṇa, that is material. Kṛṣṇa says, patraṁ puṣpaṁ phalaṁ toyaṁ yo me bhaktyā prayacchati (BG 9.26). So especially vegetarian, vegetable products, food grains, vegetables, milk, Kṛṣṇa says: "If somebody offers Me with love and devotion, then I accept them." Our proposal is that you take remnants of foodstuff taken by Kṛṣṇa. Therefore we offer this foodstuff from food grains, fruits, vegetable, milk, we offer to Kṛṣṇa, and you take the remnants of foodstuff. There is no question of vegetarian, nonvegetarian. Even nonvegetarian, he is eating sinful things, provided he is not offering to Kṛṣṇa. First of all, things must be offered to Kṛṣṇa, and then take it. It is prepared.
Question (translated): What does it mean, to use something in Kṛṣṇa's service? What is this process?
Dhanañjaya: How can you use something in Kṛṣṇa's service? What is the process for using things in Kṛṣṇa's service?
Prabhupāda: Kṛṣṇa's service, as we know what is meant by service—you carry the order of some person. That is service. Master orders, and the servant carries out the order. This is service. Just like in the Bhagavad-gītā the master, Kṛṣṇa, orders Arjuna to fight. He was not willing to fight for his personal interest, but when Kṛṣṇa ordered him that "You must fight," he fought. That is service. We should dedicate our life to Kṛṣṇa, and whatever He says, we carry out. That is service. (aside:) That is sufficient?