And, y’know, there’s a 13-year-old who is going to be watching for the first time. I say crack on with every episode in order- and let the kid decide when to stop watching.
I would tell you about the ending of the X-Files, but it would put you in incredible danger. The vastness of the corruption and how deep it has penetrated the highest levels of power is beyond anything I can describe. Look! You don’t know what forces you are unleashing when you ask about the X-Files, and if you continue along this path you are putting everything you know and love into the path of something that, once started, will be impossible to stop. And you’re asking the wrong question when you ask about the ending of the X-files.
Oop! Gotta run!
(Repeat every third episode.)
The Truth Is Out There apparently has a secret meaning - The Truth Is Sure Not In Here, That’s Why We Said It’s Out There. 
The real shame of it is that X-Files has some of the best single episodes of any TV show ever in its run:
Jose Chung’s From Outer Space
Clyde Bruckman’s Final Repose
War of the Coprophages
Home
Humbug
Bad Blood
But they were all MOTW episodes. Everything that had to do with the overarching plotline sucked.
Didn’t like them, not him. They may or may not like Chris Carter, I don’t know, but the thing you quoted was clearly just talking about the episodes not the person.
Add “The Post Modern Frankenstein” and you have the definitive list right there.
Jose Chung not part of the mytharc? Poppycock! It explains EVERYTHING. It IS the mytharc.
Everything is spelled out there in that one episode. All the answers you need are in there.
I’m kidding.
Or, am I?
You should watch. It’s all true, not fiction. Just ask the scientists at the Solar Observatory in New Mexico. That is, if you could ask them.