As you undoubtedly know, there is no right answer to this question. In light of this, here are some possible variations.
Martin Luther King is one individual who possessed the strength to maintain his own “dream” of equality. His dream was to make his dream into reality. His dream was to see the day where the theory of freedom and equality was made into a social reality. However, it was difficult for him because, the hearts of people are not easy to change. Moreover, his vision was far ahead of his contemporaries.
Here is another version:
Martin Luther King is one individual who possessed the strength to maintain his own “dream” of equality. His dream was to stir people into thinking and turn their thinking into action, and turn their action into a society that sees that all people have inalienable rights to live free lives and seek happiness apart from the color of their skin. However, it was difficult for him because people were slow to see. They were afraid of so radical a change, even through in their heart of hearts they knew what war right. In the end, Martin Luther though courage could see and do, whereas most of America was blind and fumbled in darkness in fear.