It was in Book VIII that Augustine used the analogy of a waking man that wanted to get out of his bed.
In Book VIII, it informs about the story of Augustine’s conversion experience in Milan, where it starts in an agonizing state of spiritual paralysis and concludes with a euphoric decision, which directs in wholly embracing celibacy and the Catholic faith.
Renaissance is your answer for this one.
Answer:
He uses concrete images like "black gates and barbed wire that create strong emotion.
