It is no secret that great user interface designs are those that are invisible or designed to stay out of the way. Great user interface designs engage users without distracting them. Rather, effective UIs let users complete goals. Therefore, it is essential for user interface designers to thoroughly understand the basic principle of UI design i.e. SIMPLICITY. Simple designs are not just the most engaging designs but they are also the one that attract and retain users in the long term. Here we have listed some great quotes that explain the core concept behind the simplicity in user interface design. Checkout!