As far as the customer is concerned, the interface is the product.
Jef Raskin
An interface is humane if it is responsive to human needs and considerate of human frailties.
Jef Raskin
Imagine if every Thursday your shoes exploded if you tied them the usual way. This happens to us all the time with computers, and nobody thinks of complaining.
Jef Raskin
Once the product's task is known, design the interface first; then implement to the interface design.