Question

So let us begin anew—remembering on both sides that civility is not a sign of weakness, and sincerity is always subject to proof. Let us never negotiate out of fear. But let us never fear to negotiate.
He repeats words to emphasize why the United States should never negotiate.
He repeats words to emphasize why the United States should maintain its civility.
He repeats words to emphasize the conditions under which the United States will negotiate.