Every man at three years old is half his height
Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory.
Every action needs to be prompted by a motive.
A luminous body will appear more brilliant in proportion as it is surrounded by deeper shadow.
To speak well of a base man is much the same as speaking ill of a good man.
Perspective is the rein and rudder of painting.