Most ideas don't work out. Almost all ideas don't work out. So it's okay if yours didn't work out.
The longer you work on something, the more you don't really want to know what the world is going to tell you.
When you try to do something ten per cent better, you tend to work from where you are: if I ask you to make a car that goes 50 miles a gallon, you can just retool the engine you already have.
When technology reaches that level of invisibility in our lives, that's our ultimate goal. It vanishes into our lives. It says, 'You don't have to do the work; I'll do the work.'