With regard to any action which you give in a picture to an old man or to a young one, you must make it more energetic in the young man in proportion as he is stronger than the old one; and in the same way with a young man and an infant.
600.
OF SETTING ON THE LIMBS.
The limbs which are used for labour must be muscular and those which are not much used you must make without muscles and softly rounded.
OF THE ACTION OF THE FIGURES.
Represent your figures in such action as may be fitted to express what purpose is in the mind of each; otherwise your art will not be admirable.
V.
SUGGESTIONS FOR COMPOSITIONS.
Of painting battle pieces (601-603).
601.