In line 28 we can see a shift in the speaker's focus to speculation about the limits that nature has.
Explanation:
In line 28, the speaker's approach changes and he begins to address nature in a more influential and profound way, showing the limits of it. This is to show that even something great like nature, has fineness, that is, it has limitations. This can be applied to the physical sense of nature, or even to the subjective and more conceptual sense of the effect of nature.
§ No bikes allowed. My friend wanted to bring their bike to the public park so they could ride around the playground area while their little sibling played on the swings with the babysitter, but there was a strict no bike rule around or in the park. They/she didn't think the rule was fair because people should at least be allowed to ride their bike INFRONT of the park on the sidewalks or parking lot since it's not like they/she was planning to ride their bike on the playground or anything, just on the sidewalk or parking lot infront of it. §