1 Thessalonians 5:21 says’ But test everything; hold fast what is good.
Scripture instructs us to “test and prove all things,” which would include our old notions, and then “hold fast” to the good ones—the ones that pass the test. A mistake many make is to follow tenaciously the instruction of to “hold fast to what we have” while completely ignoring the additional instructions to test first.
Experience proves that not all that we believe is truth, even if held fast for forty years. We have to test our beliefs continually and rigorously against the only standard that counts which is the Bible. Human nature is lazy and takes the easy road at every opportunity. It will rely on human reasoning, the word of others, or tradition and not do the hard work of studying the Bible and believing what it actually says.
Question for you? What’s happening in your life at this very minute where you need to be caution? Are you testing it? And if they weren’t proven to be good did you let it go?