When I worked in aerospace, the group manager I worked with had an inside joke about sending left over documents to the Redundancy Department of Redundancy. Of course, that psychotic disposition to rechecking everything was both job security and helped keep future passengers on the airlines safe, so we didn’t complain too much.
Theology can be a little bit like that. Once a person has become convinced of an idea, they see it in all kinds of other Scriptures. Passages that previously would have had another meaning to them, will now point to the doctrine that they have recently adopted. The same affect occurs when defending a point of belief, having put it in the forefront of your mind you see it in every passage for a while.
This can be good or bad, depending on whether what you are seeing is really there, or whether your enthusiasm has caused you to read into the passage what you wanted to see. We humans are really good at reading into the Bible instead of reading out of it. Whether we want to admit it or not, we tend to read looking for what we are already convinced it is going to say, instead of looking for what it will say.
For this reason, it’s a good idea to check what point you are drawing out in several ways. Does it fit the context, either as a main point or as a logical aside? Could this passage be read so as to mean something else on the point I am seeing? Does it agree with the nature of Scripture and the character of God?
Scripture can be misread, but we can protect ourselves from misinterpretation with a few simple questions and an open mind.