Gerhard and Walther

All the saints prayed diligently, and, as God’s friends, they eagerly spoke with God the Lord with prayer. Anywhere in the Holy Scriptures where a true believer and saint is mentioned, at the same time, there is an announcement that he prayed to God.—Johann Gerhard, Schola Pietatis III:325.

This (1 Cor. 10:11) should serve as a warning for us, lest we be offended by the falls into sin that still take place in the true Church, as if the Church would be false because of sin. It remains the true Church when God’s pure Word is preached there and the Sacraments are administered according to His institution.—C. F. W. Walther, God Grant It!, p. 629.