Happiness is the only thing that multiplies when you share it. ― Albert Schweitzer

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There is neither happiness nor misery in the world; there is only the comparison of one state with another, nothing more. He who has felt the deepest grief is best able to experience supreme happiness.

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Personal happiness lies in knowing that life is not a checklist of acquisition or achievement. Your qualifications are not your life. — J.K. Rowling

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Morality is not the doctrine of how we may make ourselves happy, but how we may make ourselves worthy of happiness. - Immanuel Kant

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I think the saddest people always try their hardest to make people happy because they know what it's like to feel absolutely worthless and they don't want anyone else to feel like that. ― Robin Williams

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Not to be absolutely certain is, I think, one of the essential things in rationality.

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The happiness of your life depends upon the quality of your thoughts. ― Marcus Aurelius

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Beauty is the promise of happiness. - Edmund Burke

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It's like Tolstoy said. Happiness is an allegory, unhappiness a story.

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Action may not always bring happiness; but there is no happiness without action. – Benjamin Disraeli

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