Donald Norman

"Beauty and brains, pleasure and usability - they should go hand in hand."

"In my opinion, no single design is apt to be optimal for everyone."

"Readers always seem to think that the author has some control over the design of their books."

"It is relatively easy to design for the perfect cases, when everything goes right, or when all the information required is available in proper format."

"User-centered design means working with your users all throughout the project."

"Also note that invariably when we design something that can be used by those with disabilities, we often make it better for everyone."