One of my favorite:
“A designer knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away.”
—Antoine De Saint-Exupery
....and there’s plenty more such quotes
“In most people’s vocabularies, design means veneer. It’s interior decorating. It’s the fabric of the curtains and sofa. But to me, nothing could be further from the meaning of design. Design is the fundamental soul of a man-made creation that ends up expressing itself in successive outer layers of the product or service.”
”The Public is more Familiar with Bad Design than Good Design. It is, in effect, conditioned to prefer Bad Design, because that is what it lives with. The new becomes Threatening, the Old Reassuring.” —- Paul Rand
Good design is often decided not by what it is but by who is looking at it or when it is looked at or the circumstances under which it is being looked at.