Inanimate instruments, such as the flute or the harp, may give a sound, but if no intervals occur in their music, how can one make out the air that is being played either on flute or on harp?

And when it took the scroll, the four living Creatures and the four and twenty Presbyters fell down before the Lamb, each with his harp and with golden bowls full of incense (that is, full of the prayers of the saints),

And I heard a voice from heaven like the sound of many waves and the sound of loud thunder; the voice I heard was like harpists playing on their harps;

And I saw what was like a sea of glass mixed with fire, and, standing beside the sea of glass, those who came off conquerors from the Beast and his statue and the cipher of his name; they had harps of God

doctors of the Law is what they want to be, but they have no idea either of the meaning of the words they use or of the themes on which they harp.