Turn your world on its head.For more than thirty years, John Piper pastored in the rough and tumble realities of downtown Minneapolis, preaching his people through the ups and down of life one Sunday at a time. When it came to capturing a generation of joy in one final sermon series, he turned to ten trademark truths to leave ringing in his peoples' ears.These ten are world-shaking truths-each astonishing in its own way. First they turned Piper's own world upside down. Then his church's. And they will continue to turn the whole world upside down as the gospel of Christ advances in distance and depth. These surprising doctrines, as Piper writes, are "wildly untamable, explosively uncontainable, and electrically future-creating."Join a veteran author, pastor, and Christian leader as he captures the ten astonishing, compassionate, life-giving, joy-awakening, hope-sustaining truths that have held everything together for him.This book is a revised edition of the earlier title,Doctrine Matters.