The fact is that “scriptura” by its very nature is a book that people read, so it cannot stand “sola” — alone and isolated from the humans who read it. Every time we read the Bible, we are seeing it through the windows of our own experience, and understanding it according to our own reasoning. And this practically always encompasses at least some church tradition regarding how to understand the text. So sola scriptura, instead of giving us an objective means for judging the legitimacy of church tradition, ends up merely giving us the illusion of objectivity, while we fail to notice or examine the church traditions and other underlying factors which affect the way we understand the Bible texts.
The quote comes from the post “Sola Scriptura?” on the blog Wordgazer’s Words.