The more an organ is restrained, the more vehement is its impulse.
This law is based upon the vibration of the pendulum. Great levers have slow movements, small agents more rapid ones. The head moves more rapidly when the torso and the eye have great facility of motion. Thus the titillations of the eye are rapid as lightning.
This titillation always announces an emotion. Surprise is feigned if there is no titillation.
For example, at the unexpected visit of a friend there is a lighting up of the eye. Wherefore? Because the image is active in the imagination. This is an image which passes within ourselves, which lies in inward phenomena.
So in relation to material phenomena: there is a convergence, a direction of the eyes toward the object; if the object changes place, the eyes cannot modify their manner of convergence; they must close to find a new direction, a convergence suited to the distance of the object.
There is never sympathetic vision. The phenomena of the imagination are in the imagination at a fixed distance. When an image changes place in the idea, it produces a titillation equal to that which would be produced in the order of material things. For example, let us quote these lines:
"At last I have him in my power,
This fatal foe, this haughty conqueror!
Through him my captives leave their slavery."
Here the body must be calm; there is a sort of vehemence in the eyes; it will be less in the head than in the arms. All these movements are made, but the body remains firm. Generally the reverse takes place; the whole body is moved; but this is wrong.
In these words: "Where are they, these wretches?" there must be great violence in the upper part of the body, but the step is very calm.
To affect a violent gait is an awkward habit. A modified slowness in the small agents creates emphasis; if we give them too great facility of movement, the gestures become mean and wretched.