Patram puspam phalam toyam yo me bhaktya prayacchati. This is the real point. Krsna, the Supreme Person who is giving all the necessities of all the living entities... He is actually the provider, maintainer of everyone. So why He is asking a little fruit, flower and water from you? Is He hungry? No. Yo me bhaktya prayacchati. Just to induce you again to love Krsna. That is the point. Because your, this material condition is bhutva bhutva pralayate [Bg. 8.19], subjected to birth, death, old age, disease, and so many other material conditions. You have fallen in this condition because you have forgotten Krsna.
Lecture oт Bhagavad-gita 2.39, London, September 12, 1973