Some of the principles articulated by John Calvin are still at the core of Presbyterian beliefs. Among these are the sovereignty of God, the authority of Scripture, justification by grace through faith and the priesthood of all believers. What these tenets mean is that God is the supreme authority throughout the universe. Our knowledge of God and God’s purpose for humanity comes from the Bible, particularly what is revealed in the New Testament through the life of Jesus Christ. Our salvation (justification) through Jesus is God’s generous gift to us and not the result of our own accomplishments. It is everyone’s job — ministers and lay people alike — to share this Good News with the whole world. That is also why the Presbyterian church is governed at all levels by a combination of clergy and laity, all people, serving in ministry together. You can find our full beliefs of the PC USA, here.
“Baptism enacts and seals what the Word proclaims: God’s redeeming grace offered to all people. Baptism is at once God’s gift of grace, God’s means of grace, and God’s call to respond to that grace. Through Baptism, Jesus Christ calls us to repentance, faithfulness, and discipleship. Through Baptism, the Holy Spirit gives the Church its identity and commissions the Church for service in the world” (Book of Order: W-3.0402).
The Presbyterian Church (U.S.A.) has two sacraments, baptism, and the Lord’s Supper.
THE LORD'S SUPPER
“The Lord’s Supper enacts and seals what the Word proclaims: God’s sustaining grace offered to all people. The Lord’s Supper is at once God’s gift of grace, God’s means of grace, and God’s call to respond to that grace. Through the Lord’s Supper, Jesus Christ nourishes us in righteousness, faithfulness, and discipleship. Through the Lord’s Supper, the Holy Spirit renews the Church in its identity and sends the Church to mission in the world” (W-3.0409).