Even in the human form of life they are also trying for the same thing as cats and dogs are trying. The cats and dogs, they are also trying to find out where it is, food, where sleeping comfort, where sex life and where defense. If the human form of life is also utilized for this purpose, pravrtti-marga, then it is, as I was talking in the park, it is just like using sandalwood for burning fuel.

There is distinction even in wood. There are so many jungle wood, we can use it for cooking. But if the sandalwood, which is so valuable, if we do not know what is the value of sandalwood, if we use it for cooking and burning… Similarly, if we use this human form of life exactly like the cats and dogs, simply for sense gratification, then we are committing suicide.

From Srila Prabhupada’s lecture on Srimad-Bhagavatam 6.1.1 — 5 May, 1976