Technology may change rapidly, but people change slowly. The principals [of design] come from understanding of people. They remain true forever.

If people keep buying poorly designed products, manufacturers and designers will think they are doing the right thing and continue as usual.

Everyday people are not very good designers.

Isn't one of your first exercises in learning how to communicate to write a description of how to tie your shoelaces? The point being that it's basically impossible to use text to show that

When a device as simple as a door has to come with an instruction manual—even a one-word manual—then it is a failure, poorly designed.

To me, error analysis is the sweet spot for improvement.

The problem with emotion was that it was clearly something important, but-at least according to the old philosophy-it was something to overcome.