This book is in response to the notion that Jesus' flesh was "heavenly" rather than "earthly." Historically, this idea is similar to Monophysitism, the teaching that Jesus had only one nature. It is even more radical, however, for it denies any biological relationship between the virgin Mary and Jesus. The testimony of Scripture is that Jesus is fully God and fully man. In the Incarnation, God stands in solidarity with humanity. Like all miracles, this is one we must accept by faith.