"The Christian faith is mysterious not because it is so complicated but because it is so simple. A person does not start with baptism and then advance to higher mysteries. In baptism each believer already possesses the faith in its fullness. ... In the same way, it takes considerable effort to begin to comprehend all that we have received in Christ. Theological thinking does not add a single thing to what we have received. The inheritance remains the same whether we grasp its magnitude or not. But the better we grasp it, the happier we are. So this small book is an invitation to happiness. I have written it with a glad heart, and I hope it will be helpful for others who want to comprehend the mystery of faith in all its 'breadth and length and height and depth, and to know the love Christ that surpasses knowledge' (Eph 3:18-19)."--Preface, pages xv-xvi