On the Propers of the Mass

Dom Mark Daniel Kirby of the Vultus Christi blog has a very engaging post about the origin and development of the propers of the mass: those prayers and elements of the mass that change depending on the liturgical feast or season. For example, concerning the Introit:

The purpose of the Introit in the tradition of the Roman Rite is not didactic; it is contemplative. The Introit ushers the soul into the mystery of the day not by explaining it, but by opening the Mass with a word uttered from above. The text of the Introit signifies that, in every celebration, the initiative is divine, not human; it is a word received that quickens the Church-at-Prayer, and awakens a response within her.

Read the whole post.