A single harmony
Let what we are describing be compared to a great chorus. As then the chorus is composed of different people, children, women again, and old men, and those who are still young, and, when one, namely the conductor, gives the sign, each utters sound according to his nature and power, the man as a man, the child as a child, the old man as an old man, and the young man as a young man, while all make up a single harmony;