UN General Assembly
1979

64. In most negotiations, we can best make progress by stages. A knot can never be untied from the inside. We must begin with the parts that we can grasp, and work our way through to the end of the problem. 65. History will judge us severely if we let our opportunities for peace slip away. As negotiations proceed, the issues we address become progressively more difficult. But we must not let future fears or ambitions undermine the progress that has been made.