Every action done by nature is done in the shortest way.
All our knowledge originates in opinion.
life without love, is no life at all
The painter who has no doubt about his own ability will attain very little.
The eye transmits its own image through the air to all the objects which face it, and also receives them on its own surface, whence the "sensus communis" takes them and considers them.
Nature alone is the master of true genius.