Why are Christians not to be blown about by every wind of doctrine?
Christians are not to be blown about because they have received and stand in the one gospel Paul preached, a positional standing that anchors them. Those shallow in Scripture lack stability and can be swayed by any persuasive, pious-sounding doctrine brought to their door.
Les explains that the reason believers should not be blown about with every wind of doctrine is tied to standing in the gospel Paul preached. In 1 Corinthians 15:1, Paul declares the gospel the Corinthians received and wherein they stand, which Les calls a positional term. Because some people are shallow in their understanding of Scripture, they are vulnerable when someone comes to their door with a good line and a nice, pious approach, and they fall for it. Stability comes from the received gospel, not every passing doctrine.