As Christians we believe that God's Word is unchanging. Our God doesn't flip-flop or change His mind. When He gave us His Word, it was final and infallible. In contrast, we humans tend to change pretty much at the drop of a dime.
One week, we'll have an extreme opinion on a topic, but then the next we'll learn more and change our opinion. Some of us seem to change our careers every five years or so. Our tastes and style change every time the newest fad hits the market. One of the seemingly biggest changes to hit us most recently is the change in the way we learn.