It answers the question that was tormenting you: my love, you are not 'one thing in my life' - not even the most important - because my life no longer belongs to me because...you are always me.
Jean-Paul SartreWith despair, true optimism begins: the optimism of the man who expects nothing, who knows he has no rights and nothing coming to him, who rejoices in counting on himself alone and in acting alone for the good of all.
Jean-Paul Sartre