Who would believe that so small a space could contain the images of all the universe?

The noblest pleasure is the joy of understanding.

Learning acquired in youth arrests the evil of old age.

O Time! consumer of all things; O envious age! thou dost destroy all things and devour all things with the relentless teeth of years, little by little in a slow death. Helen, when she looked in her mirror, seeing the withered wrinkles made in her face by old age, wept and wondered why she had twice been carried away.

Perspective is a most subtle discovery in mathematical studies, for by means of lines it causes to appear distant that which is near, and large that which is small.

He who never puts his trust in any man will never be deceived.

I have solved what color is, however ; I still have no idea about what line is.