Here is a site that has quotes by him.
Here are a few of my favorites:
I have a dream that my four little children will one day live in a nation where they will not be judged by the color of their skin, but by the content of their character.
I have decided to stick with love. Hate is too great a burden to bear.
I just want to do God's will. And he's allowed me to go 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.
If a man hasn't discovered something that he will die for, he isn't fit to live.
A man can't ride you unless your back is bent.