+ Saints +
Before Jesus Christ died for our sins and opened the gates of heaven there were no saints in heaven. Therefore there are no Old Testament writings that would mention them.
Very few of the new Christians died before most of the New Testament was written. Therefore there is little in the Bible about asking saints to pray for us.
However the last book of the Bible does talk about the saints in heaven praying.
Revelation 5:8: Each of the elders held a harp and gold bowls filled with incense, which are the prayers of the holy ones.
Revelation 8:3-4: He was given a great quantity of incense to offer, along with the prayers of all the holy ones, on the gold altar that was before the throne. The smoke of the incense along with the prayers of the holy ones went up before God from the hand of the angel.
The Holy Spirit guided the early Church in many things not explained in the Bible including how does the Body of Christ (believers) living on Earth relate to the Body of Christ (saints) living in heaven. We are still one Body.
Catholics share the belief in the Communion of Saints with many other Christians, including the Eastern Orthodox, Anglican, Episcopal, and Methodist Churches.
The Communion of Saints is the belief where all saints are intimately related in the Body of Christ, a family. When you die and go to heaven, you do not leave this family.
Everyone in heaven or on their way to heaven are saints, you, me, my deceased grandmother, Mary the mother of Jesus, Mother Teresa and Pope John Paul II.
As part of this family, you may ask your family and friends living here on earth to pray for you. Or, you may also ask the Blessed Virgin Mary, Saint Andrew, or your deceased grandmother living in heaven to pray for you.
Prayer to saints in heaven is simple communication, not worship.
Asking others to pray for you whether your loved ones on Earth or your loved ones in heaven is always optional.
For more information, see the Catechism of the Catholic Church, section 946 and following: http://www.usccb.org/catechism/text/pt1sect2chpt3art9p5.htm#946
+ Confession and Reconciliation +
The Catholic Church believes that "Only God forgives sin."
When a penitent person asks God for forgiveness, his (or her) sins are immediately forgiven.
Catholics also believe that when someone sins they not only hurt their relationship with God, they also injure the entire church, the body of Christ.
Jesus said, "I will give you the keys to the kingdom of heaven. Whatever you bind on earth shall be bound in heaven; and whatever you loose on earth shall be loosed in heaven." (Matthew 16:19)
And when he had said this, he breathed on them and said to them,"Receive the holy Spirit. Whose sins you forgive are forgiven them, and whose sins you retain are retained." (Luke 20:22-23)
Oral confessing of sins is recommended over and over in both the Old and New Testaments:
+ James 5:16
+ Acts 19:18
+ Matthew 3:5-6
+ Mark 1:5
+ 1 Timothy 6:12
+ 1 John 1:9
+ Numbers 5:6-7
+ Nehemiah 9:2
+ Sirach 4:26
The Sacrament of Penance and Reconciliation with a priest ordained in the name of Jesus Christ not only reconciles the sinner to God but with the entire church, including you and me.
Remember all sacraments are encounters with God. This sacrament is a healing encounter between God and the penitent.
For more information, see the Catechism of the Catholic Church, section 1422 and following: http://www.usccb.org/catechism/text/pt2sect2chpt2.htm
+ With love in Christ.