St. Teresa gives many fascinating insights into the spiritual life regarding relatives, confessors, health, the snares of Satan, supernatural vs. natural love, and more. She also explains what contemplation is and how it differs from ordinary mental and vocal prayer. In the process, she analyzes the Our Father phrase by phrase, explaining how to transform our vocal prayer into mental prayer. St. Teresa assures us that those who practice this simple mental prayer may hope that God will grant them the "prayer of quiet," which is the beginning of contemplation and of God's heavenly "Kingdom" enjoyed even on this earth.