"Well, I have my very strong reason to know how to handle difficult people. I have to deal with an unreasonable indian guy every weekday. Is this enough?". No you are not telling your mind what you want. Just telling your mind that you have a strong reason that is not telling your mind what you want to get from the book. I like the example of a purpose i gave you better because it is giving you specifics.

I might change my example of a purpose to this; What processes are occuring and what is happening when a person comes to a resolution with a difficult person. Let me know what you think.
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