“The feelings that hurt most, the emotions that sting most, are those that are absurd - The longing for impossible things, precisely because they are impossible; nostalgia for what never was; the desire for what could have been; regret over not being someone else; dissatisfaction with the world's existence. All these half-tones of the soul's consciousness create in us a painful landscape, an eternal sunset of what we are.” 
― Fernando Pessoa, The Book of Disquiet