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.
And in Jesus Christ, his only Son, our Lord.
his 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.
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.
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.
He descended into hell. The third day he arose again from the dead.
he 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.
He ascended into heaven and is seated at the right hand of God the Father Almighty.
he 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.
He will come again to judge the living and the dead.
his 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)
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.
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 Matthew16 when he says, "I will build My Church."
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.
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.
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.
Note: Purgatory DOES exist, even tough MOST CATHOLICS ARE IN DENIAL OR ARE IGNORANT OF THIS MATTER. Others have their own wacky beliefs about purgatory and the afterlife. I assure you that these beliefs are false, and encourage you to get information about purgatory from reliable sources (not b.s. that someone made up)