Even before Melanchthon sank into his grave, he was dismayed at seeing Lutheranism stiffen into dogmas and formulas, and heartbroken by a persecution from his fellow-Protestants more bitter than anything he had ever experienced from Catholics.

Note: White here cites A. Harnack, Address Before the University of Berlin (1897), pp.16 and following - Seven Great Statesmen in the Warfare of Humanity with Unreason (1915)