“Nature”

“Nature” is one of those words I suspect doesn't actually have any meaning. When the Only-begotten son was little I came along with his class on an excursion in a nearby forest. Everyone was to pick up something that could be found “in the nature” and then tell a bit about it. I picked up a plastic bag I found along the way. The children in the class were very dubious. (The teachers were probably dubious too, but they were too polite to contradict me.) “Plastic bags don't exist in nature!” I found it in the forest, isn't the forest nature? “But they're not made from natural things!” They're made of oil, and oil exists in nature. “But you have to do things to the oil.” That squirrel-gnawed pine cone has also been done things to. “But…”

The converse is things that are “unnatural” or “against nature”. These actually seem to have a definition, they are “phenomena that the speaker personally dislikes”. But in reality, things that are unnatural simply cannot exist. The laws of nature are strict^*, but you will never be punished for breaking them. Nobody will ever drag you to court for having exceeded the speed of light in vacuum. You will never get sued for having destroyed energy. You will simply just never do it. Accordingly, if you suspect something is against nature, your understanding is incorrect, go study some more.

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^* So our understanding of the laws may be incomplete, but that's a different matter. (Or energy.)