In the "Escape from the Seraglio" (1782) there was a still greater advance, and here is seen the beginning of what is now known as German opera. Mozart, while composing it, wrote his father at various times concerning his operatic creed. Quotations from these letters will perhaps best explain his theories: "A man who abandons himself to his anger, becomes extravagant and is no longer master of himself. If music paints anger, it must imitate its model; and however violent the passions may be they should never provoke disgust. Music ought never to wound the ear. Even in the most horrible situations it ought to satisfy the ear. Music should always remain music." Here it will be seen that he is with La Harpe and against Gluck. "Poetry in opera should be the obedient daughter of music. Why do the Italian operas, in spite of miserable texts, please everywhere, even in Paris? Because the music dominates as sovereign and everything else is accepted." Here again Mozart is directly opposed to Gluck; the former is the disciple of the Italian school; the latter faithful to the French theory. Perhaps, as Victor Wilder suggests, the truth is between the two extreme points; poetry and music in opera are necessarily in reciprocal independence, and each ought in turn to dominate the other, as the action hastens or is at a standstill. Gluck himself admitted that "the union between words and music should be so close that the poem seems as much made for the music as the music for the poem." Now Italian dramatic music was chiefly concerned with the whole effect of the poetical thought; the French was more concerned with the detail; the German was more allied to the symphony, and there was a more even balance between the vocal melody and the instrumental phrase. (It will be borne in mind that I speak of German opera as it existed before the theories and work of Richard Wagner.) As "Idomeneo" is distinguished by choral dignity and French frankness of dramatic expression, the "Escape from the Seraglio" is characterized by exquisite melody, by delightful ensemble, and by ingenious instrumentation. There is an exuberance, a freshness in this opera, that led von Weber to affirm that here Mozart had reached "the full maturity of his powers as an artist, and that his further progress after that was only in knowledge of the world." It would be an interesting task to show the growth of Mozart's dramatic genius as seen in this glorification of the old German Singspiel; the characterization of the different parts by musical means. His letters to his father show the pains he took in the instrumentation, now seeking with triangle, big drum and cymbals Turkish effects, now emphasizing the sighs of Belmont with muted strings and the flute.