“If you aren’t in the moment, you are either looking forward to uncertainty, or back to pain and regret.”
Carrey: 'Life Is Too Beautiful': Star Talks About Bouts With Depression And His Spirituality http://www.cbsnews.com/stories/2004/11/18/60minutes/main656547.shtml 60 Minutes (21 November 2004)
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Jim Carrey 21
Canadian-American actor, comedian, and producer 1962Related quotes

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“I'd rather look forward and dream, than look backward and regret.”
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"Je ne parle pas français," http://digital.library.upenn.edu/women/mansfield/bliss/bliss.html#francais from Bliss and Other Stories (1920)
Variant: I have made it a rule of my life never to regret and never to look back. Regret is an appalling waste of energy, and no one who intends to become a writer can afford to indulge in it.
Context: I have made it a rule of my life never to regret and never to look back. Regret is an appalling waste of energy, and no one who intends to become a writer can afford to indulge in it. You can't get it into shape; you can't build on it; it's only good for wallowing in.

“Look forward, not back. Correct your course and go on. You cannot undo yesterday's journey.”
Source: Ship of Magic