Art and nature shall always be wrestling until they eventually conquer one another so that the victory is the same stroke and line: that which is conquered, conquers at the same time.

This quote is talking about the relationship between art and nature. It suggests that these two forces will always be in opposition. No matter what happens, the result will be a balance between the two, with neither one winning over the other. Instead, the outcome of their “wrestling match” will be a combination of both art and nature, a unity between them. The end result is a single expression that includes elements of both.