These rascals, they do not know. They are so much ungrateful. They are taking milk from the cows, and when the milk is no more supplied, “All right, send it to the slaughterhouse.” Once he has taken milk, he’s indebted; again, it is being killed by him. So how much he has become entangled in his karma he does not know.

Srila Prabhupada/ Talk on Srimad-Bhagavatam 1.8.49 — October 29, 1974, Mayapur