This Gitopanisad, Bhagavad-gita, the essence of all the Upanishads, is just like a cow, and
Lord Krishna, who is famous as a cowherd boy, is milking this cow. Arjuna is just like a calf, and learned scholars and
pure devotees are to drink the nectarean milk of Bhagavad-gita. (Introduction to Bhagavad-gita As It Is)