“War doesn't negate decency. It demands it, even more than in times of peace.”

“Peace demands the most heroic labor and the most difficult sacrifice. It demands greater heroism than war. It demands greater fidelity to the truth and a much more perfect purity of conscience.”

“The governments hated the peace party even more than each other, since their existence now depended on war.”

“As for me, I cease not to advocate peace. It may be on unjust terms, but even so it is more expedient than the justest of civil wars.”
Equidem ad pacem hortari non desino; quae vel iniusta utilior est quam iustissimum bellum cum civibus.

“This may not be a just peace, but it is more just than the continuation of war.”

“More than all, the citizen and his representative in Congress in time of war must maintain his right of free speech. More than in times of peace it is necessary that the channels for free public discussion of governmental policies shall be open and unclogged.”

“The music is the best … even more than peace and love”

“Humanity will be forever at war as long as there is no common enemy. World peace demands a new Hitler.”

“Beware
At war
Or at peace,
More people die
Of unenlightened self-interest
Than of any other disease”

“Nothing is more certain than that war promotes science and increases comforts. Utopia may mean no more wars, but universal peace and plenty will never reign until at least one more war raises mankind to a plane of such comfort and ease that nobody on either side of a frontier can even imagine the possibility of resorting to arms. Comfort creates wars and comfort may someday end them.”