Since there are so many churches which call themselves the Christian church, we are at present all the more obligated to search the Word of God in order to ascertain which is the true church, and which congregation holds to the truth. He who therefore earnestly searches God’s Word by either reading it, hearing it read, or hearing it preached, and who perseveringly, humbly, and heartily prays to be led into the truth, may expect that the Lord will bring him to the true church. If he is already in the true church, he may also expect that the Lord, to his joy, will assure him of this.

WILHELMUS À BRAKEL, THE CHRISTIAN’S REASONABLE SERVICE, VOL. 2, 4.