Book excerpt: In 2002, while touring North America with his wife in an RV, John Suk -- lifelong Christian, longtime pastor, and noted leader in the Christian Reformed Church -- experienced a crippling crisis of faith. He emerged from that dark time with a strange new gift -- doubt. In Not Sure Suk takes readers on an eyes-wide-open, deeply personal voyage through the past and present of Christian belief, reexamining Christian faith -- in his own life and in fifteen centuries of Christian history -- through a skeptic's eyes. He exposes major pitfalls of modern Christian movements and questions what he considers to be faulty paradigms: the "personal relationship with Jesus," the "health-and-wealth gospel," and traditional ethnicity-based belief systems. In the end he is left clinging to what is for him a truer, wiser kind of faith in Jesus Christ -- faith that struggles and lives with doubt.