The greater the man's soul, the deeper he loves.

Any color is more distinctly seen when opposed to its contrary: thus, black on white, blear near yellow, green near red, and so on.

Inequality is the cause of all local movements.

For those colours which you wish to be beautiful, always first prepare a pure white ground.

Mechanics is the paradise of the mathematical sciences because by means of it one comes to the fruits of mathematics.

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

Nothing is hidden under the sun.