II. They are useful in proportion to our own (not to anybody else's)
real knowledge of them.

We do not study useless subjects, and it is not from our books, nor
from our teacher that we go through life, making our way. In other
words, the harder we work, the more independent we become; and the
more independent we become, the more power we have to help others.

Now, whatever is true about other school studies is likewise true
about music. It is given to children in school because it is useful,
and because a child can gain power by learning it. Let us see about
this.

To one who does not think deeply, it might seem that if any study in
school is merely ornamental, that study is music. He might say that
all the other studies tend to some practical end in life and business:
that one could not add, nor read, nor transact business, nor write a
letter any more correctly by knowing music. It is only an unthinking
person--_none other_--who would say that.

Of the usefulness of all the school studies we have spoken. We need
only to take a few steps along the pleasant road, about which we have
had so many Talks, and we shall see how much music means in life. To
us it is already plain. Music is a new world, to enter which
cultivates new senses, teaches us to love the beautiful, and makes us
watchful of two of the most important things in life: the thoughts and
the heart. We must have exact thoughts or the music is not made
aright, and the heart may be what it will, music tells all about it.
Therefore, let it be good.