Book Description: In the early 18th century, a Christian named Count Zinzendorf formed a secret society called the Honorable Order of the Grain of Mustard. Members wore a ring inscribed with the words "No man liveth unto himself" and took a solemn vow to be true to Christ, to be kind to people and to take the Gospel to the nations. Zinzendorf’s vow to live unselfishly is as challenging today as ever. Through these principles, Pete Greig offers a "rule of life" for a generation looking for guidance through a chaotic culture. Included is a 40-day devotional to dig deeper into biblical principles, plus a full-color bonus section featuring a visual interpretation of "The Vision," a prayerful manifesto written by Greig that’s become a rallying cry of a generation.