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    The last chapter discussed the importance of using good grammar and good word choice in your writing. However, the most grammatically perfect paragraph will not receive a good grade if it is poorly organized and not focused on a central idea. The paragraph must have unity and coherence. These ideas were discussed briefly in chapter 22, but in this chapter we will explore unity and coherence more fully so that you can learn how these elements impact your writing.
     As you learned in Chapter 22, coherence is whether or not what you write makes sense and whether or not the ideas are arranged in a logical manner. If ideas are out of order in writing, then the reader has a very difficult time trying to understand your point. As a result the reader will lose interest and you will not be able to convey your point.
     Unity is equally important. Unity means that your writing sticks to one point at a time. When you mix and match ideas in writing jumping from one idea to the next and back again, the reader has a hard time following you. Inevitably, the reader will not understand your point and will eventually lose interest. This chapter explores ways to help you make certain that your writing is both coherent and unified.