CHAPTER XXI.^

The importance of making a firm resolution, from the
very first, to persevere in prayer and to heed no
obstacles raised against it by the devil.

1. Fortitude needed for mental prayer. 2. Subjects suited to it. 3. The Pater
Noster used as mental prayer. 4. The world's objections to mental prayer.
5. God provides teachers to help us. 6. Perseverance necessary in the
practice.