suitability of colouring, artistic composition, and finish.

_Hsieh Ho_ (Chinese, sixth century A.D.).


XII

In painting, the most troublesome subject is man, then landscape, then
dogs and horses, then buildings, which being fixed objects are easy to
manage up to a certain point, but of which it is difficult to get
finished pictures.

_Ku K'ai-Chih_ (Chinese, fourth century A.D.).


XIII

First it is necessary to know what this sort of imitation is, and to
define it.

Definition:

It is an imitation made with lines and with colours on some plane
surface of everything that can be seen under the sun. Its object is to
give delight.

Principles which may be learnt by all men of reason:

No visible object can be presented without light.