The hardest part of design ... is keeping features out.

Any time you see signs or labels added to a device, it is an indication of bad design: a simple lock should not require instructions.

The designer shouldn't think of a simple dichotomy between errors and correct behavior; rather, the entire interaction should be treated as a cooperative endeavor between person and machine, one in which misconceptions can arise on either side.

I prefer design by experts - by people who know what they are doing

The current paradigm is so thoroughly established that the only way to change is to start over again.

The best kind of design isn't necessarily an object, a space, or a structure: it's a process- dynamic and adaptable.

You won't catch me giving clear lectures.