Still to be neat, still to be dressed,
As you were going to a feast;
Still to be powdered, still perfumed:
Lady, it is to be presumed,
Though art's hid causes are not found,
All is not sweet, all is not sound.

Give me a look, give me a face,
That makes simplicity a grace;
Robes loosely flowing, hair as free:
Such sweet neglect more taketh me
Than all the adulteries of art;
They strike mine eyes, but not my heart.

Ben Jonson

http://www.poemhunter.com/poem/simplex-munditiis-2/