What does "Stay Hungry, Stay Foolish" mean?

Question

It was the final message in a Commencement Speech Steve Jobs did: http://www.youtube.com/watch?v=D1R-jKKp3NA

So, I get "Stay Hungry"...aka, keep learning, searching, and reaching for your dreams.

But what does "Stay Foolish" mean?

Answer 1

It means to always want more, to never be content and when you want to do something that others say is foolish do it anyways.  This is how new ideas come about.  This is how inventions are made.

Answer 2

Don't be ALL CONSUMED with your Hunger........Take the time to be foolish, have fun, live life, follow your Dream and MOST OF ALL, "Enjoy it"!

Answer 3

Stay hungry = don't try to settle for too long. Use the rest points as mile points.

Stay foolish = don't just be afraid of something -- fear is pointless in itself, so act despite the fear.