I hand the floor to my good friend Matt:
“About every three or four months I realize that I’ve spent my entire life up until now being a dumbass; the problem is that ‘now’ keeps moving and every time I think I’ve finally got everything figured out, I later determine that I was/am still a moron. I distinctly remember having this feeling for the first time in third grade, age of eight, and I keep hoping it will eventually go away, but that hope seems increasingly unfounded.”
— Matt Wedel.
[Update, the next day: I now realise that I quoted this once before, in my review of the 2010 Doctor Who Christmas special. Sorry for the repeat.]