As a society, we are no less obsessed with the immediate than when Eugene Peterson first wrote this Christian classic. If anything, email and the Internet may have intensified our quest for the quick fix. But Peterson's time-tested prescription for discipleship remains the same--a long obedience in the same direction. Tucked away in the Hebrew Psalter, Peterson discovered "an old dog-eared songbook," the Songs of Ascents that were sung by pilgrims...