Editing Tridentine Mass (section)

=== Prayers of the priest before and after Mass ===
The Tridentine Missal includes prayers for the priest to say before and after Mass.

In later editions of the Roman Missal, including that of 1962, the introductory heading of these prayers indicates that they are to be recited ''pro opportunitate'' (as circumstances allow),<ref>{{Cite web |url=http://www.latin-dictionary.org/Latin-English-Dictionary/Pro_opportunitate |title=Latin Dictionary |access-date=2014-12-02 |archive-url=https://web.archive.org/web/20150609074403/http://www.latin-dictionary.org/Latin-English-Dictionary/Pro_opportunitate |archive-date=2015-06-09 |url-status=dead }}</ref> which in practice means that they are merely optional and may be omitted. The original Tridentine Missal presents most of the prayers as obligatory, indicating as optional only a very long prayer attributed to [[Ambrose|Saint Ambrose]] (which later editions divide into seven sections, each to be recited on only one day of the week) and two other prayers attributed to Saint Ambrose and [[Thomas Aquinas|Saint Thomas Aquinas]] respectively.<ref>Manlio Sodi, Achille Maria Triacca (editors), ''Missale Romanum: Editio Princeps (1570)'' (Libreria Editrice Vaticana 1988 {{ISBN|978-88-209-2547-5}}), pp. 27–36.</ref>

In addition to these three prayers, the original Tridentine Missal proposes for the priest to recite before he celebrates Mass the whole of Psalms 83–85, 115, 129 (the numbering is that of the [[Septuagint]] and [[Vulgate]]), and a series of [[collect]]-style prayers. Later editions add, after the three that in the original Missal are only optional, prayers to the [[Mary, mother of Jesus|Blessed Virgin,]] [[Saint Joseph]], all the angels and saints, and the saint whose Mass is to be celebrated, but, as has been said, treats as optional all the prayers before Mass, even those originally given as obligatory.<ref>{{Cite web|url=http://www.preces-latinae.org/thesaurus/AnteMissam.html|title=Orationes Ante Missam|website=www.preces-latinae.org}}</ref>

The original Tridentine Missal proposes for recitation by the priest after Mass three prayers, including the ''[[Adoro te devote]]''. Later editions place before these three the Canticle of the Three Youths ([[Book of Daniel|Dan]])<ref>{{Cite web|url=http://drbo.org/cgi-bin/d?b=drb&bk=32&ch=3|title=Douay-Rheims Bible, Daniel Chapter 3|website=drbo.org}}</ref> with three collects, and follow them with the ''[[Anima Christi]]'' and seven more prayers, treating as optional even the three prescribed in the original Tridentine Missal.<ref>{{Cite web|url=http://www.preces-latinae.org/thesaurus/PostMissam.html|title=Orationes Post Missam|website=www.preces-latinae.org}}</ref>