▼6:14The word ‘nisi,’ which usually means ‘except’ or ‘unless’ (or, literally, ‘if not’), in this context indicates an oath or a swearing to something. It is like saying, “If I do not do this thing that I swear to do (or, “Unless I do this thing that I swear to do”), then may that bad thing happen to me.” However, the latter part of stating the bad thing is left off, in this case because God cannot fail to accomplish what He has sworn, and because nothing bad can happen to God.(Conte)