"When one door closes another door opens; but we so often look so long and so regretfully upon the closed door, that we do not see the ones which open for us."
- Alexander Graham Bell:
"A man is not old until regrets take the place of dreams."
- John Barrymore
"The bitterest tears shed over graves are for words left unsaid and deeds left undone."
- Harriet Beecher Stowe
"Never regret. If it's good, it's wonderful. If it's bad, it's experience."
- Victoria Holt
"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 for wallowing in."
- Katherine Mansfield
Footfalls echo in the memory
Down the passage which we did not take
Towards the door we never opened
Into the rose-garden.
- T. S. Eliot