I believe in the Apostle’s Creed which recognizes the person and work of God the Father, Jesus Christ, and the Holy Spirit the three in one Godhead. Mankind, since the fall of Adam, is sinful and separated from God by sin. God in His grace calls men to Himself and saves them through Jesus Christ by the work of the Spirit in a person as they hear the gospel. God’s justice demands a punishment for sin; this was met by God’s mercy as He sent His Son to suffer the consequences of our sin. Jesus lived the perfect life that Adam, Israel, and we could not live, and it is through repentance and faith in Him that we are redeemed and also justified in his sight (Romans 5:1-2).
“I believe that Jesus is the way the truth and the life and that no one comes to the Father apart from Him” –John 14:6. I believe in the word of God, the Bible, to be our source and standard for truth. It is infallible, without error and useful for teaching, correcting, and training in righteousness (2 Timothy 3:16). I believe that salvation is by faith alone a gift of God and not of works (Ephesians 2:8-10). I believe that as Christians fruit should flow from our love for God and from a heart and life that has been changed by Him.
This is an excerpt from (http://www.opc.org/beliefs.html) that I found helpful. I believe that it accurately describes how a person is saved and ought to then live:
Those whom God has predestined unto life are effectually drawn to Christ by the inner working of the Spirit as they hear the gospel. When they believe in Christ, God declares them righteous (justifies them), pardoning their sins and accepting them as righteous, not because of any righteousness of their own, but by imputing Christ's merits to them. They are adopted as the children of God and indwelt by the Holy Spirit, who sanctifies them, enabling them increasingly to turn from sin and act righteously. They repent of their sins (both at their conversion and thereafter), produce good works as the fruit of their faith, and persevere to the end in communion with Christ, with assurance of their salvation.