...and the figure of the hand in its seeing; and so it will do moving through the whole circle; and the same will the hand do that rises in its motion, that is, it will pass through a space, which is a continuous quantity.

[403] Of the first four parts required in a figure. Attitude is the first and noblest part of the figure; for not only does a good figure painted in a sorry attitude have disgrace, but the living one, in the highest goodness of beauty, loses reputation when its acts are not fitted to the office they have to perform. Certainly, without any doubt, this attitude is of greater speculation than is the goodness in itself of the painted figure; since such goodness of figure can be achieved by imitation of the living one, but the movement of such a figure must be born of great discernment of mind. The second noble part is the having of relief; the third is good drawing; the fourth good colouring.

[404] b. Discourse upon the practical. And you, painter, study to make your works such that they draw their viewers to themselves and hold them with great admiration and delight, and do not draw them and then drive them away, as the air does to him who on nights leaps naked from his bed to contemplate the quality of that cloudy or clear air, and, at once driven off by its cold, returns to the bed whence he first rose; but make your works like that air which in warm times draws men from their beds and holds them with delight to possess the summer coolness; and do not wish to be practical before you are learned, and let avarice...