'Tis the gift to be simple, 'tis the gift to be free
    'Tis the gift to come down where we ought to be,
And when we find ourselves in the place just right,
    'Twill be in the valley of love and delight.
When true simplicity is gained,
    To bow and to bend we shan't be ashamed,
To turn, turn will be our delight,
    Till by turning, turning we come 'round right

---Traditional Shaker song (Joseph Brackett, 1848)

Simplicity is one of the testimonies that Quakers have traditionally upheld.  Simplicity applies to material possessions, to our lifestyle, and our interior experience.  Wendy Swallow of the Reno Friends Meeting has written a helpful reflection on simplicity in modern Quaker life.  It is available here:

Personal Simplicity