Meditation, 188, 190; causes devotion, 57; produces sadness as well as joy, 62-65; the need of it, 61; not to be neglected for vocal prayer, 123; fruitful subjects for, 60; meditation on the Sacred Passion, 59; on choosing subtle subjects for meditation, 58, 60, 61 Melancholy, no fruit of devotion, 64, 65 Merit: definition of, 166; source of, 240; merits and rewards, 242; none in Heaven, 166, 243; of the Active and Contemplative Life, 240-244; the merit of prayer, 141; those of the Saints, 163; how we can merit for others, 141 Military Religious Orders, 256 Monica, St., 123 Monte Cassino, 4 Moral Acts, their nature, 225 Moral Virtues, the: Justice is the chief of the moral virtues, 221; requisites for the moral virtues, 41; their place in the Contemplative Life 182-186; their function, 41, 43, 183-185; their part in the Active Life, 220-226; how far they remain after death, 230 Movements of the soul, the three, 172, 203-210 Mysticism, 1-3 Necessity, to make a virtue of, 35, 44 Nestorius's error concerning the Person of Christ, 161 Novelty of St. Thomas's teaching, 6, 7 "Obsecration" as a part of prayer, 147-149 Observance, strictness of, 257 Occultism, 3 Office, attention at the Divine, 128 Origen on sanctity, 47; on not swearing, 148 Passion, Meditation on the Sacred, 59, 63, 128 Perfection, 44 Peter Lombard, 25 Philosophy is better than riches, 236 _Postillae_, 24 Prayer to St. Thomas before study, A, 16