on Jane Friedman site:
Few of your readers care about what you know, no matter how many years you have spent accumulating that wisdom. They care about what they need or want to understand.
You share much in common with your readers: you both live a world with numerous, competing demands on your attention, limited time for “deep reading,” and perhaps a longing for simplicity and clarity.
How do you provide the right amount of information without either oversimplifying the subject or overloading the reader? You’ll have to decide what to include and what to leave out. The more you love your subject, the harder this decision can be.