Reformed theology is a system of belief that traces its roots back to the Protestant Reformation of the 16th century. It is a school of historic, orthodox, confessional Christianity that emphasizes the sovereignty of God, the authority of Scripture, the grace of God in salvation, the necessity and significance of the church, and covenant theology. Reformed theology teaches that the Bible is the inspired and authoritative Word of God, sufficient in all matters of faith and practice. It holds to the authority of Scripture, the sovereignty of God, salvation by grace through Christ, and the necessity of evangelism. Reformed theology is sometimes called Covenant theology because of its emphasis on the covenant God made with Adam and the new covenant which came through Jesus Christ. Reformed theology is a whole-Bible theology, and the covenant is the biblical framework that shows the unity of both the Old Testament and the New, centering on the Lord Jesus Christ. Reformed theology informs our faith with centuries-old Christian doctrinal standards such as the Belgic Confession, the Heidelberg Catechism, the Canons of Dort, the Westminster Confession and Catechisms, and the Second London Baptist Confession.