478. This spiritual equilibrium, which is freedom of choice, may be illustrated by various forms of natural equilibrium. It is like the equilibrium of a man bound about his body or at his arms between two men of equal strength, one of whom draws the man between them to the right, and the other to the left, so that the man in the middle can freely turn this way or that as if unrestrained by any force; and if he turns toward the right he draws the man on his left forcibly toward him, even bringing him to the ground. It would be the same with any unresisting person, even if bound between three men on his right, and the same number on his left, of equal power; also if bound between camels or horses.
 Spiritual equilibrium, which is freedom of choice, may be compared to a balance, in each scale of which equal weights are placed; but if a slight weight is then added to either scale, the tongue of the scale begins to vibrate. It is similar with a pole or large beam balanced on its support. Each and all things within man, as the heart, the lungs, the stomach, the liver, the pancreas, the spleen, the intestines, and the rest, are in such a state of equilibrium; and for this reason each is able to discharge its functions in perfect quiet. It is the same with all the muscles; if they were without such equilibrium all action and reaction would cease, and man would no longer act as a man. Since, then, all things of the body are in such equilibrium, so are all things of the brain, and consequently all things of the mind therein, which relate to the will and understanding.
 There is a freedom also belonging to beasts, birds, fishes and insects; but these are impelled by their bodily senses, prompted by appetite and pleasure. Man would not be unlike these if his freedom to do were equal to his freedom to think. He, too, would then be impelled by his bodily senses, prompted by lust and pleasure. It is otherwise with one who heartily accepts the spiritual things of the church, and by means of them restrains his freedom of choice. Such a man is led by the Lord away from lusts and evil pleasures and his connate avidity for them, and acquires an affection for what is good, and turns away from evil. He is then transferred by the Lord nearer to the east, and at the same time to the south of the spiritual world, and is introduced into heavenly freedom, which is freedom indeed.