The ideas of “Catholic” and “Reformed” are not opposites or mutually exclusive. This claim is for the church which remained in the truth. We speak of the Catholic church as the Apostles’ Creed speaks of the “Catholic church” and in the sense of Lord's Day 21 of the Heidelberg Catechism when it states that the Son of God gathers this church out of the whole human race from the beginning to the end of the world.