Best Answer - Chosen by the Asker
It's a difficult sentence. In this context, I think it means, "Only because of looking at things did I see any significance in those things. There isn't really any significance. Things don't have a proper order or structure. It only seems that way if we look at things and try to find what the order is." This sentence is a sort of "explanation" for the previous sentence ("At some point along the way I stopped believing in significance.") The writer explains that first he/she saw order in things because looking at things makes order seem to exist, but later, he/she "stopped believing in significance."
Oh, wow. That was a hard sentence. It's a very abstract and deep paragraph.
