Gerhard and Walther

Among other reasons, God the Lord has given us His Law in His holy Word for the purpose that He in it wanted to prescribe for a person a perfect rule and guideline for good works.—Johann Gerhard, Schola Pietatis II:25. 

How is it that all true Christians have no allowed their faith in the holy Bible to waiver? It is because they “have tasted the goodness of the word of God” and the “powers of the age to come” (Heb. 6:3) that lie in it.—C. F. W. Walther, God Grant It!, p. 320.