Also watch Jonathan Ive, iPod Designer's interview at youtube
Technology Serves Humans.
Design is not Art.
(Art is about personal expression. Design, on the other hand, is about use. Unlike Art, Design is always contextual.)
The Experience Belongs to the User.
Great Design is Invisible.
(Bad design is obvious because it hurts to use. It is awkward, difficult, and complex. In a great irony of the world, bad design is much easier to see than good design. It raps us on the head like a bully. Because of its success, great design is often invisible.)
Simplicity is the Ultimate Sophistication.