Do not Swear

Why are we spending a whole sermon on just this one verse? Good question, I wanted to just pass this by but the first phrase got me, "And (or but) first of all brethren." This is a very strong statement so we best not just ignore this verse. In our Study we will try to ask and answer two questions.
I. What they were not to do (v.12a)
II. What they were to do (v.12b)