I have never written the music that was in my heart to write; perhaps I never shall with this brain and these fingers, but I know that hereafter it will be written; when instead of these few inlets of the senses through which we now secure impressions from without, there shall be a flood of impressions from all sides; and instead of these few tones of our little octave, there shall be an infinite scale of harmonies – for I feel it – I am sure of it. This world of music, whose borders even now I have scarcely entered, is a reality, is immortal.