Beyond the historical circumstances, the sacred vestments had an important function in the liturgical celebrations: In the first place, the fact that they are not worn in ordinary life, and thus possess a "liturgical" character, helps one to be detached from the everyday and its concerns in the celebration of divine worship. Furthermore, the ample form of the vestments, the alb, for example, the dalmatic and the chasuble, put the individuality of the one who wears them in second place in order to emphasize his liturgical role. One might say that the "camouflaging" of the minister’s body by the vestments depersonalizes him in a way; it is that healthy depersonalization that de-centers the celebrating minister and recognizes the true protagonist of the liturgical action: Christ. The form of the vestments, therefore, says that the liturgy is celebrated "in persona Christi" and not in the priest's own name. He who performs a liturgical function does not do so as a private person, but as a minister of the Church and an instrument in the hands of Jesus Christ. The sacred character of the vestments also has to do with their being donned according to what is prescribed in the Roman Ritual.
In the extraordinary form of the Roman Rite (the so-called Mass of Pius V), the putting on of the liturgical vestments is accompanied by prayers for each garment, prayers whose text one still finds in many sacristies. Even if these prayers are no longer obligatory (but neither are they prohibited) by the Missal of the ordinary form promulgated by Paul VI, their use is recommended since they help in the priest's preparation and recollection before the celebration of the Eucharistic sacrifice. As a confirmation of the utility of these prayers it must be noted that they are included in the "Compendium Eucharisticum," recently published by the Congregation for Divine Worship and the Discipline of the Sacraments.[2] Moreover it is useful to recall that Pius XII, with the decree of Jan. 14, 1940, assigned an indulgence of 100 days for the individual prayers.
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In conclusion, one hopes that the rediscovery of the symbolism of the liturgical vestments and the vesting prayers will encourage priests to take up again the practice of praying as they are dressing for the liturgy so as to prepare themselves for the celebration with the necessary recollection.
While it is possible to use different prayers, or simply to lift one's mind up to God, nevertheless the texts of the vesting prayers are brief, precise in their language, inspired by a biblical spirituality and have been prayed for centuries by countless sacred ministers. These prayers thus recommend themselves still today for the preparation for the liturgical celebration, even for the liturgy according to the ordinary form of the Roman Rite.