It does not make such a difference whether you are simply mute or employ no art for speaking. For it is not feasible that you can express what you think as it should be understood unless you acquire and strengthen the ability to speak by art.
But faith is not belief in the history of Christ, as the godless think, but belief in the purpose of Christ's incarnation, crucifixion, and resurrection. For he took on flesh, was crucified, and rose from the dead in order to justify all who would believe in him.Philip Melanchthon, Commonplaces: Loci Communes 1521