From a 2015 interview with Mary Oliver at On Being:

Ms. Tippett: I just love — I just want to read these. This is from Long Life also. “The world is: fun, and familiar, and healthful, and unbelievably refreshing, and lovely. And it is the theater of the spiritual; it is the multiform utterly obedient to a mystery.” 

Ms. Oliver: Yeah. Well, you know, and it is. We all wonder, “Who is God? What’s going to happen when we die?” All that stuff. And I don’t think it’s — maybe it’s never nothing. I’m very fond of Lucretius. 

Ms. Tippett: Say some more. 

Ms. Oliver: Lucretius says just everything’s a little energy. You go back, and you’re these little bits of energy, and pretty soon you’re something else. Now that’s a continuance. It’s not the one we think of when we’re talking about the golden streets and the angels with how many wings and whatever, the hierarchy of angels. Even angels have a hierarchy. But it’s something quite wonderful. 

The world is pretty much — everything is mortal. It dies. But its parts don’t die. Its parts become something else. We know that when we bury a dog in the garden and with a rose bush on top of it. We know that there is replenishment. And that’s pretty amazing. What more there might be, I don’t know. But I’m pretty confident of that one.