I hope I am

Recently I've been having this recurring feeling that I might be somehow mentally deficient, and that everyone around me is just humoring me. I say it's a feeling because I really feel it in my bones when it happens - it's almost spine-tingling as I entertain is as a real possibility. I could be an idiot after all. Idiots rarely recognise themselves as such.

A Report on Idiots in Massachusetts (1848)

Sphexishness