What metaphors are used in Hinds' Feet on High Places by Hannah Hurnard?

This novel is almost complete allegory and the largest, most important use of imagery and symbolism is the representation of God as the Shepherd. Much-Afraid has always had an emptiness inside her and she has sought for her entire life to satisfy it. That emptiness might be described as a "God-shaped hole" which, by the end of her pilgrimage, has obviously been completely filled by love and utter, unabashed faith in the love of the Shepherd, or God.