I hadn't realized the anti-Enthusiast thrust of the passage, "My thoughts are not your thoughts" (Is. 55). Here is a gem from Luther (again, from the Isaiah lectures):
The ungodly object, "You are calling us sinners. Do you not see that we are doing well? We are not like other men." To them He responds thus: 'My thoughts are not your thoughts.' This is making a clear-cut division. "Whatever you think with your most holy thought and, as the papists say, prompted by the Holy Spirit, these are not My thoughts." He has in mind not only the gross thoughts but also the thoughts provided with a most holy appearance, as those of the papists and Enthusiasts, who have covered their own thoughts with the disguise of God.