My mommy told me something
A little girl should know
It's all about the Devil
And I've learned to hate him so

She says he causes trouble
When you let him in the room
He will never ever leave you
If your heart is filled with gloom

[CHORUS]

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

[Repeat CHORUS]

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

[Repeat CHORUS]