A good memory, which nature has endowed us with, causes things long past to seem present.
Obstacles cannot bend me. Every obstacle yields to effort.
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.
Experience is a truer guide than the words of others.
I have solved what color is, however ; I still have no idea about what line is.
Fire is to represent truth because it destroys all sophistry and lies; and the mask is for lying and falsehood which conceal truth.