I just spent a couple hours reading through Satoshi's 1,000+ posts and plucked out my four favorites:

    1. (I’ve been working on bitcoin’s design) since 2007. At some point I became convinced there was a way to do this without any trust required at all and couldn’t resist to keep thinking about it.

    2. Lost coins only make everyone else’s coins worth slightly more. Think of it as a donation to everyone.

    3. Sorry to be a wet blanket. Writing a description for (bitcoin) for general audiences is bloody hard. There’s nothing to relate it to.

    4. I’m sure that in 20 years there will either be very large (bitcoin) transaction volume or no volume.

I've got a couple dozen more here: http://crypt.la/2014/01/06/satoshi-nakamoto-quotes/