This book contains a unique perspective: that of a scientifically and philosophically educated agnostic who thinks there is impressive—if maddeningly hidden—evidence for the existence of God. Science and philosophy may have revealed the poverty of the familiar sources of evidence, but they generate their own partial defense of theism.

Bryan Frances, a philosopher with a graduate degree in physics, judges the standard evidence for God’s existence to be awful. And yet, like many others with similar scientific and philosophical backgrounds, he argues that the usual reasons for...