God is ever faithful throughout history to preserve his church in the truth of his word. October 31, 1517, marks the great Reformation of the church by Martin Luther. This is significant for all Protestants and Roman Catholics. The sixteenth-century Reformation restored to the church of Christ the truths of the sole authority of God’s word and of justification by faith alone. The first was the formal principle of the Reformation; the second was the material principle. If one denies either of these principles, he stands with Rome in opposition to the Christian church.
The year 1834 marks the reformation of the Reformed Church in the Netherlands. In that year those who separated from the apostate Hervormde (Reformed) Church in the Netherlands returned to these Reformation principles and to the truth of sacred scripture as set forth in the Reformed creeds: the Belgic Confession, the Heidelberg Catechism, and the Canons of Dordrecht.