It's basically about somebody how is told to 'look on the bright side of life' and can't. He sarcastically puts down the person who told him to do so, then in his mind asks God how CAN he look on the bright side when so many bad things happen in life?
It's basically about somebody how is told to 'look on the bright side of life' and can't. He sarcastically puts down the person who told him to do so, then in his mind asks God how CAN he look on the bright side when so many bad things happen in life?