“And so here’s what I want to say to you, and here’s what I want the people at home to think about. When times are tough, and people are frustrated and angry and hurting and uncertain, the politics of constant conflict may be good. But what is good politics does not necessarily work in the real world. What works in the real world is cooperation. What works in the real world is cooperation, business and government, foundations and universities. Ask the mayors who are here. Los Angeles is getting green and Chicago is getting an infrastructure bank because Republicans and Democrats are working together to get it. They didn’t check their brains at the door. They didn’t stop disagreeing, but their purpose was to get something done. Now, why is this true? Why does cooperation work better than constant conflict? Because nobody’s right all the time, and a broken clock is right twice a day. And every one of us — every one of us and every one of them, we’re compelled to spend our fleeting lives between those two extremes, knowing we’re never going to be right all the time and hoping we’re right more than twice a day.”
Bill Clinton didn’t have this part of the speech prepared
And there are a ton of other sections like this which he made up on the spot
see “What Bill Clinton Wrote vs. What Bill Clinton Said,” by Dashiell Bennet