The poet ranks far below the painter in the representation of visible things, and far below the musician in that of invisible things.

Instrumental or mechanical science is the noblest and above all others, the most useful.

The noblest pleasure is the joy of understanding.

Fire destroys falsehood, that is sophistry, and restores truth, driving out darkness.

To make a perfume, take some rose water and wash your hands in it, then take a lavender flower and rub it with your palms, and you will achieve the desired effect

Inequality is the cause of all local movements.

I say that the power of vision extends through the visual rays to the surface of non-transparent bodies, while the power possessed by these bodies extends to the power of vision.