Gerhard and Walther

No one among us should regard his prayer as insignificant, for God the Lord Himself does not regard it as insignificant. Even before it leaves our mouth, God the Lord has actually ordered that it be written in His book. Prayer is a spirituale thymiama, a spiritual incense offering.—Johann Gerhard, Schola Pietatis III:294.

The servants of sin do not serve sluggishly and carelessly, but are highly diligent and untiring in their service. Whoever is engaged in sin carries in his heart the desire to perform it day and night.—C. F. W. Walther, God Grant It!, p. 597