I knew Growklaw shutdown some time ago, but never had the chance to read this entry. Wow. It's very dark. It really made me think. However... aside from that

I knew Growklaw shutdown some time ago, but never had the chance to read this entry. Wow. It's very dark. It really made me think. However... aside from that, and trying to shake down a bit of that darkness, I read the update with Sheier's advice, and this stood out: "Prefer symmetric cryptography over public-key cryptography. " Why would that be? I've never actually read anything that would touch on the subject. Does anyone have any references to why are these comments so? is it that symmetric crypto can use larger keys? or is it because using an OTP makes it unbreakabale?