Why Is Life Either Dark Or Bright

Why is life either dark or bright, dreary as death and joyful as birth? Why can't it be brighter than light? Some aim high at claiming their birthright, their thoughts are rooted in worth; why is life either dark or bright? For many days and nights are cursed with fright, often failure becomes an unbearable torment; why can't it be brighter than light? Could anyone restore a man's blind sight, or multiply a fish by invoking a thought? Why is life either dark or bright? And should all who seem impeccably right, hide hatred and envy by not rising a doubt? Why is life either dark or bright? Must I remind everyone how fragile is might; wasn't life created from water and dust? Why is life either dark or bright? Why can't it be brighter than light?