The central thesis of the book is that Jesus, while free from sin, was still subject to every form of temptation that humans face, including fear, doubt, depression, reluctance, and lust.
Humans face. This is including fear. Jesus, while free from sin, was still subject to every form of temptation this. The central thesis of the book is this. Fear is doubt. Fear is depression. Fear is reluctance. Fear is lust.