Gerhard and Walther

Since Christ, God’s Son—who had no need—had everything in His hand (John 3:35), still prayed fervently, should not we also pray, we who need everything and have to obtain everything from the mighty hand of God?—Johann Gerhard, Schola Pietatis III:326.

We see here a vivid example of a person who is obdurate. Such a person has fallen so far that he no longer knows what makes for his peace. The Word of God is preached to him in vain. It no longer makes an impression upon him. His heart is as indifferent as a stone.—C. F. W. Walther, God Grant It!, p. 636.