But we must not permit the many specific and immediate problems of adjustment connected with the liberation of Europe to delay the establishment of permanent machinery for the maintenance of peace. Under the threat of a common danger, the United Nations joined together in war to preserve their independence and their freedom. They must now join together to make secure the independence and freedom of all peace-loving states on that continent, so that never again shall tyranny be able to divide and conquer.

We and the other United Nations are going forward, with vigor and resolution, in our efforts to create such a system by providing for it strong and flexible institutions of joint and cooperative action.

http://www.presidency.ucsb.edu/ws/?pid=16595