The verbalisation of music involves many perils. Musicologists have surmounted those perils by creating suitable concepts and metaphors and by adopting specialised terminology from other scholarly disciplines. The development of scholarly terminology in musicology goes together with the attempt to find the most adequate means for description and characterisation of musical language. One way of doing so is to regard the current of musical sound, flowing in time, as a means of expressing changes of force, tension, quiet or disquiet. This quality of music may be compared to the idea of a dynamised current of sound, in which the listener is able directly to perceive changes of forces, tensions, kinesis and stasis. These changes are conveyed by relationships: harmonic, melodic-formal structural relationships, and also relationships of sound, metre and rhythm, texture, and register.