We've done a lot of posts about the quality presentations at the TED conference. From new systems from the leading technology companies (Photosynth) to staggering web stats that would blow your mind to new systems that could help eliminate poverty, global warming and illiteracy in the world.
There are a lot of great videos - and I'm sure there will be more. But this presentation from Conductor, Benjamin Zander, it one of the best 20 minute speeches I've ever watched.
I'm not going to spoil it. I'm just going to say that if you want to change your outlook in life - even briefly - find twenty minutes in your day to watch it.