Good design is as little design as possible. Less, but better – because it concentrates on the essential aspects, and the products are not burdened with non-essentials. Back to purity, back to simplicity.
Source: Ten Principles for Good Design (principle 10), Dieter Rams, formulated late 1970s-1980s
This is verbatim the tenth of Rams's 'Ten Principles for Good Design' ('Good design is as little design as possible'), including the gloss 'Less, but better - because it concentrates on the essential aspects... Back to purity, back to simplicity.' The principles are documented by Vitsoe and reproduced in the Rams literature (e.g. 'Weniger, aber besser / Less but Better', 1995). Attribution is not in doubt.