The thesis is an assertion about the topic. Normally you will not know your thesis until you are well into the writing of the paper. For this reason you should write your introduction last , after you know what you are able to defend. You state clearly what you are trying to say. The best rule to follow in this regard is, don t create puzzles for your reader .
Writing is communication.
If your reader can t understand you, you are failing. Avoid awkward sentences. Illustrate abstract ideas with examples. Rewriting for clarity is relatively easy if you allow time. Depth You ask probing questions .