"... you should wait until the book is finished before making a judgment on its content. By the time you have gone through twenty drafts, the characters may have developed lives of their own, completely separate from the people you based them on in the beginning. And even if someone, at some time, gets upset with your words - so what? Live your life, sing your song. Anyone who loves you will want you to have that."

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Some writers find that they don't know their themes until they've finished the first draft (I am one). They then rewrite with an eye toward balancing on that tightrope: not too contrived, not too rambling; does what I'm saying about the world below me actually add up to anything? Other writers pay attention to these things as they write the first draft. Either way, an awareness of the macro and micro levels of theme can provide one more tool for thinking about what you should write, and how.

— Nancy Kress