"This is the best book I have read that balances a life motivated by grace yet also shows the need for spiritual disciplines. It avoids the errors of legalism and also the opposite errors of permissive grace. Yes, it does show clearly where self-help ends and God’s power begins. Karl’s honesty and vulnerability about his own struggles makes this book welcoming, and hope filled. It provides specific direction for every one of us who long to see God’s continuing transforming power in our lives."