Indescribably Happy

Today while heading home from class, I met a man who is possibly the happiest man I have ever met. He is not rich, famous, I don't even think he's married. He is a janitor, I gleaned little from the short conversation I had with him. The exchange of words went a little like this:
Me: You seem pretty happy, may I ask why?
Janitor: I will answer your question with a question: why not?
Me: Well without being too rude, you don't exactly have the most glamorous job in the world.
Janitor: How do you know it's not glamorous?
Me: Well it's not very high paying, it's the same everyday, it does not challenge you-
Janitor: - So you're saying that I shouldn't be happy because I don't have the job you want?
Me: Well no, I'm just, umm.
Janitor: Take a look at this (points to a wall)
Me: What? it's a wall
Janitor: It's a clean wall!
Me: Well that spot there isn't really-
Janitor: -I cleaned that wall, ME; I also know that I have to clean this wall again in a week, and again the week after.
Me: (silence)
Janitor: But right now, just look at it, it's clean just like the other walls I washed that are around us, it keeps the image of this hallway uniform, it reflects well onto the image of the University as a whole. There's beauty in that.
Me: I suppose there is some, obscure sense of beauty in a clean hallway.
Janitor: (laughs) You students make a mess of things, I'm the one who has to put things in order again. (walks off)
Now I don't know if this guy is full of BS or not, either way he had a genuine sense of cheerfulness about him. So I guess the moral of the story is that happiness is like a clean wall, wait that doesn't work. Alright so happiness is about seeking a sense of achievement and satisfaction no matter what it is you do, yeah that's it. As far as I could tell, the janitor had no real future outside of being a janitor, he seemed pretty set in his way, yet indescribably happy. Interesting.