Success is stumbling from failure to failure without losing enthusiasm. ~ David Guy Power
I lifted the above quote from today's The Daily Grail (always an excellent site.)
I like this quote because it can be applied to the never ending search for what is behind UFOs. Some consider this search to be non-productive, since we haven't found The Big Answer. Not just non-productive, but, a failure. Still spinning our collective wheels, staying in one place.
Others, like myself, don't consider the journey a failure. It's a process, never ending (so far, and most likely will always be) but that is all right.
UFOs is a broad term. What UFOs are we talking about, as we go along, searching? There are clearly numerous types of UFOs; some connected to each other, sharing a goal, an origin, some not having anything to do with the other. If finding an answer that will satisfy for one type of UFO, that still leaves many more types that have not been explained.