Chapter IV. Having summed up the address of Liberius, St. Ambrose passes on to the virtues of his sister, especially her fasts, which however he advises her to moderate to some extent, and to exercise herself in other matters, after the example which he adduces. Especially he recommends the Lord's Prayer, and the repetition of Psalms by night, and the recitation of the Creed before daylight. · Sacred Texts