  In the Morning Lessons Mendelssohn does not emphasize that the free play of the mind has a pleasing effect on the body, but he does in his earlier writings, so let us now return to this third item in Mendelssohn’s catalogue of the axes of perfection in aesthetic experience. This is the effect of the activity of the mind in aesthetic experience on the state of the body, a point that Mendelssohn emphasizes in On Sentiments and the Rhapsody although not in the essay on the “Main Principles.” Mendelssohn says that if