Is Regret Healthy?

th“Make it a rule of life never to regret and never to look back. Regret is an appalling waste of energy; you can’t build on it; it’s only good for wallowing in.”  – Katherine Mansfield

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Hmm…interesting perspective. I would love to hear your thoughts on this quote. Yay or Nay? Do you agree with Katherine? Is Regret unhealthy? Or are there exceptions to the rule? I’ll hold off on my thoughts for now. Plus, yours is way better. 🙂