The grave will fall in upon him who digs it.

A luminous body will appear more brilliant in proportion as it is surrounded by deeper shadow.

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

People of higher talent work, even if they seem to do nothing

The knowledge of all things is possible

He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast.

It is better to imitate ancient than modern work.