„To while away the day contemplating evils that might have been is to poison the happiness we already have.“

— Christopher Paolini

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„p>Those locks of jet are turned to gray,And she is strange and far awayThat might have been mine own to-day —That might have been mine own, my dear,Through many and many a happy year —That might have sat beside me here.
— Lewis Carroll
„While experiencing happiness, we have difficulty in being conscious of it. Only when the happiness is past and we look back on it we do suddenly realize — sometimes with astonishment — how happy we had been.“
— Nikos Kazantzakis
„And as, in ethics, Evil is a consequence of Good, so, in fact, out of Joy is sorrow born. Either the memory of past bliss is the anguish of to-day, or the agonies which are, have their origin in the ecstasies which might have been.“
— Edgar Allan Poe