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 — Honolulu, May 5, 1976