" Early in life, the world divides crudely into those who have had sex and those who haven't. Later, into those who have known love, and those who haven't. Later still - at least, if we are lucky (or, on the other hand, unlucky) - it divides into those who have endured grief, and those who haven't. These divisions are absolute; they are tropics we cross. "

― Julian Barnes , Levels of Life