1. This libretto is based on the revised version published in 1961 but there were many phrases which had been altered when set to music, and the final text has been preferred here. BNC
2. Not all poems are sufficiently lyrical, and they may be overburdened with wordy information: This kind poetry is far too prolix to be successfully set to music. BNC
3. Beethoven, among others, could not comprehend how Mozart could have stooped so low as to set to music such an apparently frivolous text, dealing with the fickleness of women; and the prudish moral climate of the later 19th century made sure that Così was conveniently ignored as a little aberration. BNC