Black will always have something melancholy in it, because the sensory will always find the change to it from other colors too violent; or if it occupy the whole compass of the sight, it will then be darkness; and what was said of darkness will be applicable here.

I do not purpose to go into all that might be said to illustrate this theory of the effects of light and darkness; neither will I examine all the different effects produced by the various modifications and mixtures of these two causes.

If the foregoing observations have any foundation in nature, I conceive them very sufficient to account for all the phenomena that can arise from all the combinations of black with other colors.

To enter into every particular, or to answer every objection, would be an endless labor.

We have only followed the most leading roads; and we shall observe the same conduct in our inquiry into the cause of beauty.
SECTION XIX.
THE PHYSICAL CAUSE OF LOVE.
When we have before us such objects as excite love and complacency, the body is affected, so far as I could observe, much in the following manner: the head reclines something on one side; the eyelids are more closed than usual, and the eyes roll gently with an inclination to the object; the mouth is a little opened, and the breath drawn slowly, with now and then a low sigh; the whole body is composed, and the hands fall idly to the sides.