Quant au bonheur, il n’a presque qu’une seule utilité, rendre le malheur possible. - Marcel Proust

...infirmity alone makes us take notice and learn, and enables us to analyse mechanisms of which otherwise we should know nothing. A man who falls straight into bed night after night, and ceases to live until the moment when he wakes and rises, will surely never dream of making, I don't say great discoveries, but even minor observations about sleep. He scarcely knows that he is asleep. A little insomnia is not without its value in making us appreciate sleep, in throwing a ray of light upon that darkness. An unfailing memory is not a very powerful incentive to the study of the phenomena of memory.

Aliás, se o ciúme nos ajuda a descobrir certo pendor para a mentira na mulher que amamos, centuplica ele esse pendor quando a mulher descobre que somos ciumentos. Ela mente (em proporções como nunca nos tinha mentido antes), ou por pena, ou por medo, ou se furta instintivamente por uma fuga simétrica às nossas investigações.

Time, which changes people, does not alter the image we have of them.