Reply Obj. 1: Augustine is speaking there of that peace which is between one man and another, and he says that this peace is concord, not indeed any kind of concord, but that which is well ordered, through one man agreeing with another in respect of something befitting to both of them. For if one man concord with another, not of his own accord, but through being forced, as it were, by the fear of some evil that besets him, such concord is not really peace, because the order of each concordant is not observed, but is disturbed by some fear-inspiring cause. For this reason he premises that "peace is tranquillity of order," which tranquillity consists in all the appetitive movements in one man being set at rest together.
Reply Obj. 2: If one man consent to the same thing together with another man, his consent is nevertheless not perfectly united to himself, unless at the same time all his appetitive movements be in agreement.
Reply Obj. 3: A twofold dissension is opposed to peace, namely dissension between a man and himself, and dissension between one man and another. The latter alone is opposed to concord. _______________________
SECOND ARTICLE [II-II, Q. 29, Art. 2]
Whether All Things Desire Peace?
Objection 1: It would seem that not all things desire peace. For, according to Dionysius (Div. Nom. xi), peace "unites consent." But there cannot be unity of consent in things which are devoid of knowledge. Therefore such things cannot desire peace.
Obj. 2: Further, the appetite does not tend to opposite things at the same time. Now many desire war and dissension. Therefore all men do not desire peace.
Obj. 3: Further, good alone is an object of appetite. But a certain peace is, seemingly, evil, else Our Lord would not have said (Matt. 10:34): "I came not to send peace." Therefore all things do not desire peace.
Obj. 4: Further, that which all desire is, seemingly, the sovereign good which is the last end. But this is not true of peace, since it is attainable even by a wayfarer; else Our Lord would vainly command (Mk. 9:49): "Have peace among you." Therefore all things do not desire peace.
On the contrary, Augustine says (De Civ. Dei xix, 12, 14) that "all things desire peace": and Dionysius says the same (Div. Nom. xi).