The pleasures of the senses themselves come down in the end to intellectual pleasures—they strike us as sensory rather than intellectual only because they are known in a confused way. Music that we hear can charm us, even though its beauty consists only in relations among numbers, and in the way the beats or vibrations of the sounding body return to the same frequency at certain intervals (We are not aware of the numbers of these beats, but the soul counts them all the same!). Our pleasure in the proportions of things we see are of the same kind; and those that the other senses produce will come down to something similar, even though we couldn’t explain them so straightforwardly.
G. W. Leibniz
Colorized Italian actresses