The Forms of the Penitential Rite
There are four options for the Penitential Act (meaning by that a penitential action, not just acting penitent it should be something that is more than an act, but touches the depth of our persons). The options are called, creatively, as Forms A., B., and C., and also the Rite for Blessing and Sprinkling of Water.
Form A is known as the Confiteor, from the Latin for the first words, “I confess.” The text for this is:
I confess to almighty God
and to you, my brothers and sisters,
that I have greatly sinned,
in my thoughts and in my words,
in what I have done and in what I have failed to do,
through my fault, through my fault,
through my most grievous fault;
therefore I ask blessed Mary ever-Virgin,
all the Angels and Saints,
and you, my brothers and sisters,
to pray for me to the Lord our God.
This prayer expresses well the dual nature of sin. Sin is an offence against God and His Church, our brothers and sisters. Because we have sinned against our brothers and sisters, we tell them and not just God. We also ask for their prayers to God for us! It might be worth asking how often we pray for our brothers and sisters who have sinned. Asking Mary, the angels and saints reminds us that the Church is not just us gathered here, or even those on Earth, but the Church continues into eternity.
It is to be noted that we are instructed,
And, striking their breast, they say:
through my fault, through my fault,
through my most grievous fault;
There is debate about how many times one strikes one’s chest. The answer seems it can be done once or three times. A response from the Congregation for the Sacraments and Divine Worship states, “It does not seem, therefore, that anyone has to strike his breast three times in pronouncing those words […]. It suffices that there be a striking of the breast.” Some have read this to say that three is not necessary, but it is permitted. I will not be policing this. One time or three times is ok, as long as you do it.
[So, ok, one of my friends told me that his older brother was just old enough to have experienced the Tridintine Mass, aka “The Latin Mass.” When the Confiteor was in Latin, the phrase for striking the breast was “mea culpa, mea culpa, mea maxima culpa.” My friend’s brother admitted to thinking everyone was saying, “Me a cowboy, me a cowboy, me a Mexican cowboy.”]
When the Confiteor is used, there follows the absolution (again, not the same as the absolution in the sacrament of Reconciliation):
May almighty God have mercy on us, forgive us our sins, and bring us to everlasting life.
The Kyrie (pronounced keer-ee-ey, and not like the basketball player ki-ree!) follows. Sometime I hear people say how they like the Latin in the Mass, “like the Kyrie”—except it isn’t Latin, it is Greek. It harkens back to the earliest days of the Church when the liturgy, like the New Testament, and the common language—even in Rome—was in Greek. The text is (in Greek and English):
Kyrie eleison/Lord, have mercy
Christe eleison/Christ, have mercy
Kyrie eleison/ Lord, have mercy
This can be done by the priest or another minister than the priest, such as the cantor or choir.
Form B of the Penitential Act goes thusly:
The Priest: Have mercy on us, O Lord.
The people: For we have sinned against you.
The Priest: Show us, O Lord, your mercy.
The people: And grant us your salvation.
Then the absolution and the Kyrie follow.
Form C of the Penitential Act is where there are various invocations followed by Kyrie eleison/Lord, Have mercy or Christe eleison/Christ, Have mercy. This can be done by the priest, or the deacon, or another minister, such as the cantor.
I like Fr. J-Glenn Murray’s take on what is happening with the invocations.
The only people I think that understand the term [“Lord, Have mercy”] properly are some group of very old black women in a small town in South Carolina, Go to one woman and say “Miz Jones, you have just won 13.5 million dollars in the lottery.” Her response said in exultation and with hands raised would be to shout, “Lord, have mercy!”
These invocations are not about our sin, but are about the great things that God has done. So we say, for example, “You were sent to heal the contrite of heart” or “You are Son of God and son of Mary” and not, “Lord, we are sinners.”
Eight model versions are given in the English Roman Missal. As I read them, there are ones appropriate for each season of the year (but this may just be me reading into it):
(Advent)
Lord Jesus, you came to gather the nations into the peace of God’s kingdom: Lord, have mercy.
Lord Jesus, you come in word and sacrament to strengthen us in holiness: Christ, have mercy.
Lord Jesus, you will come in glory with salvation for your people: Lord, have mercy.
(Christmas)
Lord Jesus, you are mighty God and Prince of peace: Lord, have mercy.
Lord Jesus, you are the Son of God and Son of Mary: Christ, have mercy: The people: Christ, have mercy.
Lord Jesus, you are Word made flesh and splendor of the Father: Lord, have mercy
(Lent)
Lord Jesus, you came to reconcile us to one another and to the Father: Lord, have mercy. Lord Jesus, you heal the wounds of sin and division: Christ, have mercy.
Lord Jesus, you intercede for us with your Father: Lord, have mercy.
(Easter)
Lord Jesus, you raise the dead to life in the Spirit: Lord, have mercy
Lord Jesus, you bring pardon and peace to the sinner: Christ, have mercy:
Lord Jesus, you bring light to those in darkness: Lord, have mercy.
(Easter)
Lord Jesus, you raise us to new life: Lord, have mercy.
Lord Jesus, you forgive us our sins: Christ, have mercy
Lord Jesus, you feed us with your body and blood: Lord, have mercy.
(Ordinary Time)
Lord Jesus, you have shown us the way to the Father: Lord, have mercy.
Lord Jesus, you have given us the consolation of the truth: Christ, have mercy
Lord Jesus, you are the Good Shepherd, leading us into everlasting life: Lord, have mercy.
(Ordinary Time)
Lord Jesus, you healed the sick: Lord, have mercy.
Lord Jesus, you forgave sinners: Christ, have mercy:
Lord Jesus, you gave yourself to heal us and bring us strength: Lord, have mercy
The Rite for Blessing and Sprinkling of Water may be used in place of the Penitential Act. This is not a renewal of the baptismal promises, which happens at Easter and Confirmation, but is a reminder of our baptism into Christ.
So, how do I choose which Penitential Act is used at Mass? I don’t do it randomly. For the most part, if a deacon is present on Sunday and —except during Lent and Advent—and most weekday Masses that are not Feasts or Solemnities, I use Form C, the invocation/Kyrie. I do so because this is one of the parts given to the deacon in the liturgy, and I like to give the deacon his due—even if he is doing the invocations and the cantor adds the Kyrie/Lord, have mercy. If I am without a deacon on a Sunday, or at weekday Feasts and Solemnities and at all Masses throughout Lent, I use Form A, the Confiteor. In Advent, I use Form B. I will use the Rite for Blessing and Sprinkling of Water on the Sunday in the Octave of Easter (to pair up with the renewal of baptismal promises and sprinkling on Easter), at Pentecost (so as to start the Easter Season, also so to finish), at Baptism of the Lord (do I have to explain?), and other days that may seem appropriate, such as at 1st Communion Mass to connect Baptism and Eucharist as Sacraments of Initiation.