The book designer is an interpreter and a translator.
Chip Kidd
If I ad asked my customers what they wanted they would’ve said a faster horse.
Henry Ford 
To design is to communicate clearly by whatever means you can control or master.
Milton Glaser
Fortæl forbrugeren det de gerne vil vide og ikke det du gerne vil have de skal vide
A good designer must rely on experience, on precise, logic thinking; and on pedantic exactness. No magic will do.
Niklaus Wirth
A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools....
Douglas Adams