A book or article or something I read somewhere about theme - the most enlightening teaching I've had on theme in fact - said that the theme of a story is the writer saying "this is what I believe life is like". What do you think about this?
In fiction? Complete nonsense. If I wanted to write about my beliefs, I'd write a memoir, not novels. My life isn't that interesting anyway. I write about people with different views from me; they're independent of me and not all carbon copies of the author. That way lies Mary-Sueism.
As an example: I once wrote a character who had a particular view about a controversial subject: abortion. I won't tell you her view on the subject or mine, but it was completely the opposite to the view I hold.
So you can't read a writer's work and assume what the characters believe is a case of "I open my mouth and my creator speaks."
Theme is what
this particular world is like. I hand you a book and say, "In this universe, X, Y or Z is true." I am
not saying that about my life, or the 'real' world at all.