O sleepers! what a thing is slumber! Sleep resembles death. Ah, why then dost thou not work in such wise as that after death thou mayst retain a resemblance to perfect life, when, during life, thou art in sleep so like to the hapless dead?

Sculptured figures which appear in motion, will, in their standing position, actually look as if they were falling forward.

Fear arises sooner than anything else.

It is an acknowledged fact that we perceive errors in the work of others more readily than in our own.

We know more about the movement of celestial bodies than about the soil underfoot.

Every now and then go away, have a little relaxation, for when you come back to your work your judgment will be surer. Go some distance away because then the work appears smaller and more of it can be taken in at a glance and a lack of harmony and proportion is more readily seen.

There is no result in nature without a cause; understand the cause and you will have no need of the experiment.