"It suffices to quote only these three elements; one can easily
understand that the most elaborate manuscript is composed of only a
definite number of letters always repeating themselves, whose
juxtaposition forms phrases, then chapters, and finally the
complete work.

"Music is composed only of seven sounds whose different combinations
produce an infinite variety of melodies.

"Elementary colors are only three in number.

"All the others gravitate around them.

"Therefore, these same letters, these same notes, these same colors,
according to their amalgamation, can change in aspect and cooperate in
the production of different effects.

"The same letters can express, according to the order in which they are
placed, terror or confidence, joy or grief.

"The same is true of notes and colors.

"Common sense ought then, considering these rules, to know how to analyze
all the details and, having done this, to coordinate and to classify
them, in order to distinguish them easily.

"Coordination and classification form an integral part of common sense."

And Yoritomo, who delights in reducing the most complex questions to
examples of the rarest simplicity, says to us: