You can listen to the rousing, prophetic and death-defying 8-minute conclusion, which starts by recounting a previous assassination attempt when someone stabbed him, and ends with:
Like anybody, I would like to live a long life. Longevity has its place. But I’m not concerned about that now. I just want to do God’s will. And He’s allowed me to go up to the mountain. And I’ve looked over. And I’ve seen the Promised Land. I may not get there with you. But I want you to know tonight, that we, as a people, will get to the promised land! And so I’m happy, tonight. I’m not worried about anything. I’m not fearing any man! Mine eyes have seen the glory of the coming of the Lord!!
Martin Luther King, Jr
You can listen to the entire 43-minute speech on YouTube.