What are the motifs in The Interior Castle by Teresa of Avila?

Also in keeping with the philosophy of monastic life, Teresa teaches that even as one progresses to the most intimate levels of communion with God, souls should devote themselves to humble execution of even the most mundane tasks to be done on earth. It is a way of teaching by example and of reminding a soul that everything she does is an act of worship done for God and not for man. A soul seeking to emulate the life of Jesus, for example, would not be above any menial or humble task, and would execute it without need of either the praise or even the notice of people.