It is with philosophy as with just intonation on a piano, if you get
everything quite straight and on all fours in one department, in perfect
tune, it is delightful so long as you keep well in the middle of the key;
but as soon as you modulate you find the new key is out of tune and the
more remotely you modulate the more out of tune you get. The only way is
to distribute your error by equal temperament and leave common sense to
make the correction in philosophy which the ear does instantaneously and
involuntarily in music.