As one gets older one sees many more paths that could be taken. Artists sense within their own work that kind of swelling of possibilities which may seem a freedom or a confusion.
I have more freedom when I write fiction but my memoirs have had a much stronger impact on my readers. Somehow the 'message ' even if I am not even aware that there is one is conveyed better in this form.
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The arc of American history almost inevitably moves toward freedom. Whether it's Lincoln and the Emancipation Proclamation the expansion of women's rights or now gay rights I think there is an almost-inevitable march toward greater civil liberties.