“Peace if possible. Truth at all costs.”

Part Two, Chapter V. Ways and means of improving the condition of Europe, interspersed with miscellaneous observations.
1790s, Rights of Man, Part 2 (1792)

Variant: There is one rule for the industrialist and that is: Make the best quality of goods possible at the lowest cost possible, paying the highest wage possible.

A Brave and Startling Truth (1995)

Early Christian Latin Poets, 2000, Carolinne White, Routledge, London, p. 55. http://books.google.com/books?id=MoI963yzTisC&pg=PA55
Psalmus Contra Partem Donati - Psalm Against the Donatists (c. 393)
Context: All those of you who rejoice in peace, now it is time to judge the truth....
Undoubtedly in days gone by there were holy men as Scripture tells,
For God stated that he left behind seven thousand men in safety,
And there are many priests and kings who are righteous under the law,
There you find so many of the prophets, and many of the people too.
Tell me which of the righteous of that time claimed an altar for himself?
That wicked nation perpetrated a very large number of crimes,
They sacrificed to idols and may prophets were put to death,
Yet not a single one of the righteous withdrew from unity.
The righteous endured the unrighteous while waiting for the winnower:
They all mingled in one temple but were not mingled in their hearts;
They said such things against them yet they had a single altar.

Source: Teachings on Love

Speech in Boston (2002)
Context: Injustice and oppression will never prevail. Those who are powerful have to remember the litmus test that God gives to the powerful: what is your treatment of the poor, the hungry, the voiceless? And on the basis of that, God passes judgment.
We should put out a clarion call to the government of the people of Israel, to the Palestinian people and say: peace is possible, peace based on justice is possible. We will do all we can to assist you to achieve this peace, because it is God's dream, and you will be able to live amicably together as sisters and brothers.

Source: How to Pay for the War (1940), Ch. 8 : Rationing Price Control and Wage Control