God has always been faithful to his church by guiding and preserving her. How does he do that? He does it through the preaching of doctrine. How can true doctrine be preached? This article explains that the preaching of the Heidelberg Catechism has been a means that God used to guide in church. Catechism preaching is important to the life of the church.

Ministers have the responsibility to preach true doctrine. False doctrine is like cancer that kills the soul. This article warns against the dangers of false doctrine.