[154] [cap.31] But any one who examines all these things might add an interminable list of arguments and instances to this one present discussion. If he considered he would find the very smallest animals equal to the largest as to proportion; as for instance he would find the swallow equal to the eagle, the herring equal to the whale, and the ant equal to the elephant. For body and soul, and again pains and pleasures, and moreover affection for and dislike towards things, and all the other feelings which the nature of animals experience, are nearly all of them similar, being made equal by the rule of proportion.