To explore the whole sphere of the modern soul, to have sat in its every nook – my ambition, my torture, and my happiness.

How little you know of human happiness, you comfortable and benevolent people, for happiness and unhappiness are sisters and even twins that either grow up together, or, in your case, remain small together.

— Nietzsche

Ashis Nandy:

There survives another concept of happiness, more nuanced and yet, at the same time, more down-to-earth. It affirms that healthy, robust, authentic happiness – “authentic” in the sense existential psychoanalysis deploys the term – must have a place for unhappiness. Aoki talks about the sadness of unrealised hope and the struggle to acquire a language in which to talk about happiness. In such instances, the presence of the unpleasant does not necessarily mean the diminution of happiness. It becomes part of a happy life that oscillates between the pleasant and the unpleasant, achievement and failure, being and becoming, work and play. In such a life, work becomes vocation and leisure need not be reinvented as the antithesis of work. Vocation includes leisure, exactly as a pleasurable pastime may comprise some amount of work. The idea of perfect happiness is consigned either to the domain of the momentary or the transient or to the mythic or the legendary. It cannot be achieved in life, but may be realised in exceptional moments.

Happiness as an elliptical orbit, perhaps?