cross the enclosing fillet at exactly
the same point of its course, and thus break the continuity of its line.
Two ears of corn, or leaves, do the same thing in the mouldings round
the northern door of the Baptistery at Florence.

Sec. XXXII. Observe, however, and this is of the utmost possible
importance, that the value of this type does not consist in the mere
shutting of the ornament into a certain space, but in the acknowledgment
_by_ the ornament of the fitness of the limitation--of its own perfect
willingness to submit to it; nay, of a predisposition in itself to fall
into the ordained form, without any direct expression of the command to
do so; an anticipation of the authority, and an instant and willing
submission to it, in every fibre and spray: not merely _willing_, but
_happy_ submission, as being pleased rather than vexed to have so
beautiful a law suggested to it, and one which to follow is so justly in
accordance with its own nature. You must not cut out a branch of
hawthorn as it grows, and rule a triangle round it, and suppose that it
is then submitted to law. Not a bit of it. It is only put in a cage, and
will look as if it must get out, for its life, or wither in the
confinement. But the spirit of triangle must be put into the hawthorn.
It must suck in isoscelesism with its sap. Thorn and blossom, leaf and
spray, must grow with an awful sense of triangular necessity upon them,
for the guidance of which they are to be thankful, and to grow all the
stronger and more gloriously. And though there may be a transgression
here and there, and an adaptation to some other need, or a reaching
forth to some other end greater even than the triangle, yet this liberty
is to be always accepted under a solemn sense of special permission; and
when the full form is reached and the entire submission expressed, and
every blossom has a thrilling sense of its responsibility down into its
tiniest stamen, you may take your terminal line away if you will. No
need for it any more. The commandment is written on the heart of the
thing.

Sec. XXXIII. Then, besides this obedience to external law, there is the
obedience to internal headship, which constitutes the unity of ornament,
of which I think enough has been said for my present purpose in the
chapter on Unity in the second vol. of "Modern Painters." But I hardly
know whether to arrange as an expression of a divine law, or a
representation of a physical fact, the alternation of