In an Internet awash in Hitchens quotes, Ed Brayton picks an unheralded one. In this clip, Hitch is defending free speech against all manner of religious and political encroachments:
The whole speech is--of course--worth listening to, but the money quote is about 7 minutes in:
"My own opinion is enough for me and I claim the right to have it defended against any consensus, any majority, anywhere, any place, any time. And anyone who disagrees with this can pick a number, get on line, and kiss my ass."