Mommy told me something   A little kid should know   It's all about the devil   And I've learned to hate him so   She said he causes trouble   When you let him in the room,   He will never ever leave you   If your heart is filled with gloom         So let the sun shine in   Face it with a grin   Smilers never lose   And frowners never win   So let the sun shine in   Face it with a grin   Open up your heart and let the sun shine in         When you are unhappy   The devil wears a grin   But oh, he starts to running   When the light comes pouring in   I know he'll be unhappy   'Cause I'll never wear a frown   Maybe if we keep on smiling   He'll get tired of hanging 'round.         If I forget to say my prayers   The devil jumps with glee   But he feels so awful awful   When he sees me on my knees   So if you're full of trouble   And you never seem to win   Just open up your heart and let the sun shine in         So let the sun shine in   Face it with a grin   Smilers never lose   And frowners never win   So let the sun shine in   Face it with a grin   Open up your heart   And let the sun shine in