a Greek translation by Alexandrian Jews from the 3rd century BC, rather than in its original Hebrew version. Even after translation its grammar structure and style of syntax remained essentially Hebrew. This rendered Septuagint partly incomprehensible without serious philological studies. Despite these apparent problems the Greek translation of the Psalter not only became widespread, but was many times translated into everyday Latin, which made the meaning of the text unclear. However, the influence of these translations was so huge that believers in the West did not accept Jerome's Latin Psalter rendering of the Hebrew version. The power of usus among the ancient Christians was much stronger than the need of clear understanding. Helping tools To resolve problems of understanding and to avoid sleepiness, boredom and lack of concentration arising during long recitations, Christians added many elements to the Divine Office. A few remained relevant in Latin Christianity. Almost always the psalms are surrounded in contemporary editions of liturgical books by so-called antiphons, short sung sentences preceding and following a particular psalm or an entire psalmody (set of psalms). Antiphons have many sources. Often it is just a verse taken from a psalm as a kind of key-verse to interpret the whole poem. Usually in solemnities, feasts and special seasons of the liturgical year, like the Advent, Lent or Eastertide, antiphons render passages from the remaining books of the Bible or Patristic writings, casting light on psalms in the context of the particular liturgical time. Moreover, each psalm has a set of texts, almost always printed alongside the poem. Right after the number of a psalm, editors print the heading (Latin titulus) which is a brief summary of the psalm. A quotation from the New Testament or Patristic writings follows, providing a Christian interpretation. Each psalm ends with a doxology, which is a short praise of the Holy Trinity, putting the psalm in context. Then editors recommend to keep a "sacred silence": a time for a private silent meditation on the text. Psalm-prayers can follow. Contrary to the helping tools these prayers were not testified in the Roman Rite until the reform of the Liturgy of the Hours after the Second Vatican Council. TheGeneral Instruction of the Liturgy of the Hours does not give their particular definition, but enumerates them alongside the antiphons and the headings in Chapter 3 The Various parts of the Liturgy of the Hours, Section 2 The