User blog:Alois-pyon/What's the deal with the number 7?

I've seen plenty of manga-kas incorporate a certain number into their works, but none of them seem to realize how important numbers can get in creating the twists and turns of their mangas, as Hiro-sensei have, which, for this case, would be the number seven. It boggles me to no end, seeing as how everything practically revolves around the number seven, but with no clues as to what and why specifically is that particular number the chosen "one".

So anyway, since I'm still new around here (and wanting to make friends...), I'll ask you guys for your take on this. What's the deal with the number seven and just how important can it actually get in the entire Fairy Tail world?