The Twelve Articles of Catholic Faith
If you want to know the basics of the Catholic faith, look no further than the articles of Catholic faith. This list of twelve articles mirrors the Apostles' Creed, a prayer that sets out Catholic tenets:
Article 1: I believe in God, the Father Almighty, Creator of heaven and earth. This affirms that God exists, that he's a Triune God (one God in three persons, known as the Holy Trinity), and that he created the known universe.
Article 2: And in Jesus Christ, his only Son, our Lord. This attests that Jesus is the Son of God and that he's most certainly divine. The word Lord implies divinity, because the Greek Kyrios and the Hebrew Adonai both mean "lord" and are ascribed only to God. So the use of Lord with Jesus is meant to profess his divinity. The name Jesus comes from the Hebrew Jeshua, meaning "God saves." So Catholics believe that Jesus is Savior.
Article 3: Who was conceived by the power of the Holy Spirit and born of the Virgin Mary. This affirms the human nature of Christ, meaning he had a real, true human mother, and also affirms his divine nature, meaning he had no human father but by the power of the Holy Spirit was conceived in the womb of the Virgin Mary. He's therefore considered both God and man by Christians—fully divine and fully human.
Article 4: He suffered under Pontius Pilate, was crucified, died, and was buried. The human nature of Christ could feel pain and actually die, and he did on Good Friday. The mention of Pontius Pilate by name wasn't meant so much to vilify him forever in history but to place the Crucifixion within human history.
Reference is made to an actual historical person, the Roman governor of Judea, appointed by Caesar, to put the life and death of Jesus within a chronological and historical context. It also reminds the faithful that one can't blame all Jews for the death of Jesus, as some have erroneously done over the ages. Certain Jewish leaders conspired against Jesus, but the actual death sentence was given by a Roman and carried out by Roman soldiers. So both Jew and Gentile alike shared in the spilling of innocent blood. Anti-Semitism based on the Crucifixion of Jesus is inaccurate, unjust, and erroneous.
Article 5: He descended into hell. The third day he arose again from the dead. The hell Jesus descended into wasn't the hell of the damned, where Jews and Christians believe the devil and his demons reside. Hell was merely a word that Jews and early Christians used to describe the place of the dead. This passage affirms that on the third day he rose, meaning Jesus came back from the dead of his own divine power. He wasn't just clinically dead for a few minutes; he was dead dead — then he rose from the dead. More than a resuscitated corpse, Jesus possessed a glorified and risen body.
Article 6: He ascended into heaven and is seated at the right hand of God the Father Almighty. The Ascension reminds the faithful that after the human and divine natures of Christ were united in the Incarnation, they could never be separated. In other words, after the saving death and Resurrection, Jesus didn't dump his human body as if he didn't need it anymore. Catholicism teaches that his human body will exist forever. Where Jesus went, body and soul, into heaven, the faithful hope one day to follow.
Article 7: He will come again to judge the living and the dead. This article affirms the Second Coming of Christ at the end of the world to be its judge. Judgment Day, Day of Reckoning, Doomsday—they're all metaphors for the end of time when what's known as the General Judgment will occur. Catholics believe that after the death of any human person, immediate private judgment occurs and the person goes directly to heaven, hell, or purgatory (an intermediate place in preparation for heaven).
Article 8: I believe in the Holy Spirit, This part reminds the believer that God exists in three persons — the Holy Trinity — God the Father, God the Son, and God the Holy Spirit. What's referred to as the Force in the movie Star Wars isn't the same as the Holy Spirit, who is a distinct person equal to the other two — God the Father and God the Son.
Article 9: the holy catholic Church, the Communion of Saints, Catholics believe that the Church is more than a mere institution and certainly not a necessary evil. It's an essential dimension and aspect of spiritual life. Christ explicitly uses the word church (ekklesia in Greek) in Matthew 16 when he says, "I will build My Church."
Article 10: the forgiveness of sins, Christ came to save the world from sin. Belief in the forgiveness of sins is essential to Christianity. Catholicism believes sins are forgiven in Baptism and in the Sacrament of Penance.
Article 11: the resurrection of the body, From the Catholic perspective, a human being is a union of body and soul, so death is just the momentary separation of body and soul until the end of the world, the Second Coming of Christ, the General Judgment, and the resurrection of the dead. The just go, body and soul, into heaven, and the damned go, body and soul, into hell.
Article 12: And in life everlasting. As Christ Our Savior died, so, too, must mere mortals. As he rose, so shall all human beings. Death is the only way to cross from this life into the next. At the very moment of death, private judgment occurs; Christ judges the soul:
* If it's particularly holy and virtuous, the soul goes directly to heaven.
* If it's evil and wicked and dies in mortal sin, it's damned for eternity in hell.
* If a person lived a life not bad enough to warrant hell but not holy enough to go right to heaven, Catholics believe the soul goes to purgatory, which is a middle ground between heaven and earth, a state where departed souls want to go to be cleansed of any attachments to sin before going through the pearly gates.

Catholicism Glossary
Advent
The religious season before Christmas when Christians prepare to celebrate the birth of Christ.

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altar
A raised table-like structure from which a priest celebrates Mass.

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annulment
A canon law decree that declares that a marriage was never a valid sacrament in the first place, usually because one or both of the partners did not enter into it with good faith and intentions.

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apostles
The 12 men who accompanied and supported Jesus and were trained by him to spread Christianity.

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archdiocese
A large diocese run by an archbishop.

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Ash Wednesday
The first day of Lent when Catholics are anointed with ashes as a reminder of their mortality.

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Baptism
The essential sacrament that washes away original sin and welcomes the baptized person into the Church.

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Holy Trinity
The Catholic belief that God, the one Supreme Being, is made up of three persons: God the Father, God the Son, and God the Holy Spirit.

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bishop
A man ordained first to the priesthood, then elevated to the next level by the pope. A bishop oversees a diocese; an archbishop oversees an archdiocese.

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Byzantine Catholicism; Eastern Catholicism
A branch of Catholicism that recognizes the authority of the pope and celebrates the sacraments, but whose rituals differ from those of Western or Roman Catholic sects.

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canon law
The supreme law of the Catholic Church that spells out the rules and regulations that guide the Church.

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cardinal
An ordained man elevated to the step just below the pope. Cardinals help the pope administer to the faithful and a new pope is elected from among them when a pope dies.

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catechism
A book that contains the doctrines of Catholicism.

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celibacy
A formal and solemn oath to never enter the married state. Priests take a vow of celibacy.

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chalice
The gold or silver cup that holds the wine that will become Christ’s body and blood during the Mass.

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cleric
A member of the clergy.

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confession; penance
A sacrament during which a Catholic confesses all known mortal sins to a priest.

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Consecration
The part during the Mass when the priest changes the bread and wine into the body and blood of Jesus.

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creed
A Christian oath, stating what Catholics believe as revealed to them by God through Sacred Scripture and Sacred Tradition. Key Catholic creed are the Apostles’ Creed and the Nicene Creed.

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deacon
An ordained man who normally has no intention or desire of becoming a priest. A deacon may be single or married.

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diocese
A collection of parishes overseen by a bishop.

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feast day
The day in the Catholic calendar when a specific saint’s holy life and deeds are remembered.

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genuflection
The act of touching the right knee to the floor while bending the left knee as a gesture of respect and obedience to God.

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godparent
Sponsor to a child or adult being baptized.

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Good Friday
The Friday before Easter Sunday; the day Jesus died on the cross.

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grace
A totally free, unmerited gift from God. Grace is a sharing in the divine; the inspiration to do God’s will.

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Heaven
A place of eternal joy and the ecstasy of dwelling with God.

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Hell
A place of eternal torment and damnation.

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Holy Communion; Holy Eucharist
The essential sacrament of Catholicism in which a host consecrated by a priest becomes literally the body and blood of Jesus and is received by the Catholic faithful.

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holy day of obligation
A day in the Catholic calendar when all Catholics must attend Mass.

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homily
The sermon given after the Gospel is read at Mass. Different than a sermon in that it’s a explanation and reflection on the Word of God, read only by clergy.

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host
A wafer of bread used in a Eucharistic service. It becomes the Host (capitalized) when consecrated.

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infallible
Incapable of error. The pope is believed to be infallible when he teaches a doctrine on faith or morals to the universal Church.

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laity; lay people
Non-ordained, everyday Catholics. Members of a religious organization who are not clergy.

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lector
A layperson trained for the task of reading at Mass.

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Lent
The 40 days before Easter, when Catholics prepare for the death and resurrection of Jesus through fasting, abstinence, and prayer, often giving up a specific treat for the duration of the season.

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Mass
The formal, official worship service of Catholicism. Catholics are required to attend Mass every Sunday and on holy days of obligation.

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mortal sin
A sin that kills grace; committing a mortal sin is tantamount to choosing Hell over Heaven.

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natural family planning NFP
The only sanctioned birth control method for Catholics, it relies on charting a woman’s fertile cycle and abstaining from sex during fertile periods to prevent pregnancy.

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original sin
Sin passed down to every human from Adam and Eve; the Sacrament of Baptism washes it away.

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parish
A collection of neighborhoods in one region of a county within a given state under the spiritual care of a priest.

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pope
The supreme head of the Catholic Church.

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priest
An ordained man responsible for administering the sacraments and tending to the spiritual health of his parishioners.

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purgatory
A spiritual state of the soul in which it is purified before entering heaven.

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sacrament
A rite established by Jesus Christ to bring grace to those participating in or receiving it. The seven sacraments of Catholicism are Baptism, Penance, Confirmation, Holy Eucharist, Matrimony, Holy Orders, and Anointing of the Sick.

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seminarian
A student training for the priesthood.

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seminary
The equivalent of Protestant divinity school where men are trained for the priesthood.

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sign of the cross
A gesture of respect in which a Catholic uses the right hand to touch the forehead, then the middle of the breast, then the left shoulder, and finally the right shoulder.

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Ten Commandments
God’s laws as given to Moses. Following the Commandments is the path to a holy life; breaking them is the basis of sin.

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transubstantiation
The act of changing the substances of bread and wine into the Body and Blood of Christ.

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Vatican
The physical seat of the Catholic Church; the pope lives and rules from the Vatican.

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venial sin
A transgression that inflicts a slight wound to the soul and which may be forgiven by making a confession and a sincere act of contrition.