I remember being at the church a few hours after the church was bombed in Birmingham, the 16th Street Baptist Church. It was very hard and very difficult to stand on that corner across the street from the church. Or to go Mississippi and search for the three civil rights workers who came up missing. There is a lot of trauma.

The last thing we want is a monolithic viewpoint where six people are standing before a president saying the same thing over and over again.

We have so many issues today that we need to confront. Comprehensive immigration reform. We have to solve the issue of poverty, the issue of hunger, the issue of war - spending billions of dollars to kill rather than to build. We have to deal with the fact that all of our children should be receiving the best possible education.

Young people can understand, and must understand, that we had success, we had failures, but we never gave up. We never gave in. We never became bitter. We didn't hate. We continued to press on. And that's what we're saying: There are some ups, there are some downs, and when you're not down, you must have the capacity and the ability to get up and keep going.

If we must grind up human flesh and bones in the industrial machine that we call modern America, then, before God, I assert that those who consume the coal and you and I who benefit from that service, because we live in comfort, we owe protection to those men first and we owe security for their families if they die.

Sen. McCain and Gov. Palin are sowing the seeds of hatred and division, and there is no need for this hostility in our political discourse.

But you have to have hope. You have to be optimistic in order to continue to move forward.