기독교 강요
In 1829, Hendrik de Cock (who is also known as the father of the Secession) became minister of the Dutch Reformed Church in the town of Ulrum, near the city of Groningen. He was not evangelical but his congregation was. One of the members gave him the Canons of Dordt to read. This, plus his own discovery of John Calvin's "Institutes of the Christian Religion", led to a great change in his preaching.