I'm not sure if I could tell the difference—between just staring into space and thinking. We're usually thinking all the time, aren't we? Not that we live in order to think, but the opposite isn't true either—that we think in order to live. I believe, contrary to Descartes, that we sometimes think in order not to be. Staring into space might unintentionally have the opposite effect.
Blind Willow, Sleeping Woman (ed. Vintage, 2007) - ISBN: 9780307387622