Each day has to pass through the darkness of night . We all have our shear of happiness and sadness like it, or not they will come

Life is more like rides of Piano. Black and white rides are just like happiness & sadness of life. As we play we press both rides for music, so as the life we all have our shear of happiness and sadness like it, or not they will come; as each day has to pass through the darkness of night.