From Augustine’s De Civitate Dei, 19.13.1:
Pax itaque corporis est ordinata temperatura partium, pax animae irrationalis ordinata requies appetitionum, pax animae rationalis ordinata cognitionis actionisque consensio, pax corporis et animae ordinata vita et salus animantis, pax hominis mortalis et Dei ordinata in fide sub aeterna lege oboedientia, pax hominum ordinata concordia, pax domus ordinata imperandi atque oboediendi concordia cohabitantium, pax civitatis ordinata imperandi atque oboediendi concordia civium, pax caelestis civitatis ordinatissima et concordissima societas fruendi Deo et invicem in Deo, pax omnium rerum tranquillitas ordinis. Ordo est parium dispariumque rerum sua cuique loca tribuens dispositio. Proinde miseri, quia, in quantum miseri sunt, utique in pace non sunt, tranquillitate quidem ordinis carent, ubi perturbatio nulla est; verumtamen quia merito iusteque sunt miseri, in ea quoque ipsa miseria sua praeter ordinem esse non possunt; non quidem coniuncti beatis, sed ab eis tamen ordinis lege seiuncti. Qui cum sine perturbatione sunt, rebus, in quibus sunt, quantacumque congruentia coaptantur; ac per hoc inest eis ordinis nonnulla tranquillitas, inest ergo nonnulla pax. Verum ideo miseri sunt, quia, etsi in aliqua securitate non dolent, non tamen ibi sunt, ubi securi esse ac dolere non debeant; miseriores autem, si pax eis cum ipsa lege non est, qua naturalis ordo administratur. Cum autem dolent, ex qua parte dolent, pacis perturbatio facta est; in illa vero adhuc pax est, in qua nec dolor urit nec compago ipsa dissolvitur. Sicut ergo est quaedam vita sine dolore, dolor autem sine aliqua vita esse non potest: sic est quaedam pax sine ullo bello, bellum vero esse sine aliqua pace non potest; non secundum id, quod bellum est, sed secundum id, quod ab eis vel in eis geritur, quae aliquae naturae sunt; quod nullo modo essent, si non qualicumque pace subsisterent.
In translation, this is rendered:
The peace of the body then consists in the duly proportioned arrangement of its parts. The peace of the irrational soul is the harmonious repose of the appetites, and that of the rational soul the harmony of knowledge and action. The peace of body and soul is the well-ordered and harmonious life and health of the living creature. Peace between man and God is the well-ordered obedience of faith to eternal law. Peace between man and man is well-ordered concord. Domestic peace is the well-ordered concord between those of the family who rule and those who obey. Civil peace is a similar concord among the citizens. The peace of the celestial city is the perfectly ordered and harmonious enjoyment of God, and of one another in God. The peace of all things is the tranquillity of order. Order is the distribution which allots things equal and unequal, each to its own place. And hence, though the miserable, in so far as they are such, do certainly not enjoy peace, but are severed from that tranquillity of order in which there is no disturbance, nevertheless, inasmuch as they are deservedly and justly miserable, they are by their very misery connected with order. They are not, indeed, conjoined with the blessed, but they are disjoined from them by the law of order. And though they are disquieted, their circumstances are notwithstanding adjusted to them, and consequently they have some tranquillity of order, and therefore some peace. But they are wretched because, although not wholly miserable, they are not in that place where any mixture of misery is impossible. They would, however, be more wretched if they had not that peace which arises from being in harmony with the natural order of things. When they suffer, their peace is in so far disturbed; but their peace continues in so far as they do not suffer, and in so far as their nature continues to exist. As, then, there may be life without pain, while there cannot be pain without some kind of life, so there may be peace without war, but there cannot be war without some kind of peace, because war supposes the existence of some natures to wage it, and these natures cannot exist without peace of one kind or other.