Some trees shed their leaves once a season. Some trees do it on summer, some trees in temperate regions do it on Autumn before the Winter. Nevertheless, the shedding season turns them almost dead and ugly. The surprise comes after the shedding season, as if like a phoenix, spring backs to life, grow additional leaves and starts their flowering season and bounces back more beautifully than ever. Maybe that is how living things grow: they shed something for within, they hibernate for a while and bounce back better than ever.
Maybe that is why human beings shed tears, time and again.