The Sixth Couplet belongs to the Third Collects {134} which ask for spiritual guidance, and spiritual light--_Blessed are the pure in heart, for they shall see God_. B. The Collects. The Books formerly used in Church. In a passage of the Prayer Book Preface of 1549, which was not struck out until the last Revision in 1662, it was said that "by this order the Curates shall need none other books for their public service, but this book and the Bible." The simplification of the Services has made it possible for everyone to find his way easily through the Prayer Book. The progressive inventions of printing, and of fine paper, have made it possible for him to have the books always with him. Before the reign of Edward VI. the Services, though printed, were not contained in one book. Before the invention of printing the books were of necessity numerous. We may mention some of them. A book of Lessons--Legenda; of Antiphons--Antiphonarium; of Psalms--the Psalter: these were required for the Day Hours. As an abbreviation of them, sufficient for practical purposes, the Breviary was arranged. A portable form of it was called Portiforium. The Breviary was printed in four volumes on the Continent, but in England had only a Winter Volume and a Summer Volume. For the Occasional Services,--the Services which mark the great events of a Christian's life, beginning with Baptism and ending with Burial, they had the Manual. {135} For the Holy Communion, they had the Missal; including (1) the Gradual, which was an Antiphoner, or book of the musical parts of the Service; (2) the Lectionary, or book of the Epistles; (3) the Evangelistarium, or book of the Gospels; and (4) the Sacramentary. The Sacramentary contained, amongst other things, the Collects. We have already referred to the combination and simplification of the Breviary Services, which have given us our Morning and Evening Prayer. We must now observe that many of our Collects come from the Sacramentaries. Three celebrated Sacramentaries. Three of the Sacramentaries deserve here special mention. I. Gregory the Great, who was Pope of Rome from 590 to 604, was the author of one of them. The English Church owes him gratitude for sending missionaries to this country at a time when the older British Church was deficient in missionary zeal: and we must here notice our debt to him for a number of our best-known collects, as well as other improvements in the Services. Canon Bright gives a list of 32 or 33 taken from Gregory's Book. Some of them may perhaps have been added after Gregory's time; for it is often difficult to distinguish between the original passages of an ancient Service-book and the additions which were quickly made to it.