The first object of the painter is to make a flat plane appear as a body in relief and projecting from that plane

It reflects no great honor on a painter to be able to execute only one thing well -- such as a head, an academy figure, or draperies, animals, landscapes, or the like -- in other words, confining himself to some particular object of study. This is so because there is scarcely a person so devoid of genius as to fail of success if he applies himself earnestly to one branch of study and practices it continually.

Just as a well-filled day brings blessed sleep, so a well-employed life brings a blessed death.

Man's external form, marvellously constructed, is not much as compared with the divine soul that dwells inside that structure.

I have always felt it is my destiny to build a machine that would allow man to fly.

The deeper the feeling, the greater the pain

Demetrius was wont to say that there was no difference between the words and speech of the unskilled and ignorant and the sounds and rumblings caused by the stomach being full of superfluous wind. This he said, not without reason, for, as he held, it did not in the least matter from what part of them the voice emanated, whether from the lower parts or the mouth, since the one and the other were of equal worth and importance.