• “If one man be at concord with another because he is coerced by the fear of penalty and not of his own free will, then his condition is not one of peace.”
—S.T., II-II, q. 29, a. 1, ad. 1.
• “By peace a man is single-minded in himself and of one mind with others outside.”
—Commentary in II Thessalonicenses, III, lect. 2
• “Peace is opposed to conflict within oneself, as well as to conflict with others outside.”
—S.T., II-II, q. 29, a. 1, ad. 2.
• “Peace is indirectly the work of justice, which removes the obstacles, but directly it is the work of friendship.”
—S.T. II-II, q. 29, a. 3, ad. 3.
• “Peace is not a virtue, but the fruit of virtue.”
—S.T., II-II, q. 29, a. 4.
(Thomas Gilby translation)