Peace cannot be obtained on earth unless human welfare is safeguarded and people freely and trustingly share with one another the riches of their minds and their talents. A firm determination to respect the dignity of others and other peoples along with the deliberate practice of love are absolutely necessary for the achievement of peace. Accordingly, peace is also the fruit of love, for love goes beyond what justice can ensure.
Therefore, all Christians are earnestly to speak the truth in love (cf. Ephesians 4:15) and join with all who love peace in pleading for peace and trying to bring it about. In the same spirit we cannot but express our admiration for all who forgo the use of violence to vindicate their rights and resort to those other means of defense which are available to weaker parties, provided it can be done without harm to the rights and duties of others and of the community.
Insofar as all are sinners, the threat of war hangs over them and will so continue until the coming of Christ; but insofar as they can vanquish sin by coming together in charity, violence itself will be vanquished adn they will make these words come true. "They shall beat their swords into plowshares, and their spears into pruning hooks; nation shall not life up sword against nation, neither shall they learn war anymore." (Isaiah 2:4).
--Vatican II, The Church in the Modern World
The word that Isaiah the son of Amoz saw concerning Judah and Jerusalem.--Isaiah 2 (KJV)
And it shall come to pass in the last days, that the mountain of the LORD'S house shall be established in the top of the mountains, and shall be exalted above the hills; and all nations shall flow unto it.
And many people shall go and say, Come ye, and let us go up to the mountain of the LORD, to the house of the God of Jacob; and he will teach us of his ways, and we will walk in his paths: for out of Zion shall go forth the law, and the word of the LORD from Jerusalem.
And he shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more.
O house of Jacob, come ye, and let us walk in the light of the LORD.
Therefore thou hast forsaken thy people the house of Jacob, because they be replenished from the east, and are soothsayers like the Philistines, and they please themselves in the children of strangers.
Their land also is full of silver and gold, neither is there any end of their treasures; their land is also full of horses, neither is there any end of their chariots:
Their land also is full of idols; they worship the work of their own hands, that which their own fingers have made:
And the mean man boweth down, and the great man humbleth himself: therefore forgive them not.
Enter into the rock, and hide thee in the dust, for fear of the LORD, and for the glory of his majesty.
The lofty looks of man shall be humbled, and the haughtiness of men shall be bowed down, and the LORD alone shall be exalted in that day.
For the day of the LORD of hosts shall be upon every one that is proud and lofty, and upon every one that is lifted up; and he shall be brought low:
And upon all the cedars of Lebanon, that are high and lifted up, and upon all the oaks of Bashan,
And upon all the high mountains, and upon all the hills that are lifted up,
And upon every high tower, and upon every fenced wall,
And upon all the ships of Tarshish, and upon all pleasant pictures.
And the loftiness of man shall be bowed down, and the haughtiness of men shall be made low: and the LORD alone shall be exalted in that day.
And the idols he shall utterly abolish.
And they shall go into the holes of the rocks, and into the caves of the earth, for fear of the LORD, and for the glory of his majesty, when he ariseth to shake terribly the earth.
In that day a man shall cast his idols of silver, and his idols of gold, which they made each one for himself to worship, to the moles and to the bats;
To go into the clefts of the rocks, and into the tops of the ragged rocks, for fear of the LORD, and for the glory of his majesty, when he ariseth to shake terribly the earth.
Cease ye from man, whose breath is in his nostrils: for wherein is he to be accounted of?
--T.S. Eliot, "The Waste Land"
Nothing that is worth doing can be achieved in our lifetime; therefore we must be saved by hope.
Nothing which is true or beautiful or good makes complete sense in any immediate context of history; therefore we must be saved by faith.
Nothing we do, however virtuous, can be accomplished alone; therefore we must be saved by love.
No virtuous act is quite as virtuous from the standpoint of our friend or foe as it is from our standpoint.
Therefore we must be saved by the final form of love which is forgiveness.