— Ursula Goodenough American biologist 1943
Context: We all eat or are eaten. That's the way life works, it's a greater rhythm. And that's why science and the understandings it has uncovered can be a source of joy.
This all relates to assent, a very important Judeo-Christian concept. "Thy will be done" is a God-kind of assent. "God works in mysterious ways," and you're supposed to give assent even if you don't like it. As a religious naturalist, I think of assent differently. Assent is saying, "Okay, for whatever reason, this is the way life works. It's an acceptance of what is. After that fundamental acceptance, I can live my life to minimize suffering and promote as much as good as I can, and try through whatever work I do to help others." We can't get around death, but we can get around poverty. We can try to avoid women being brutalized. We can curb environmental degradation.
One can start from the perspective of a religious naturalist or from the perspective of the world religions and arrive at the same place: a moral imperative that this Earth and its creatures be respected and cherished.