Lyrics:

My mother told me something that everyone should know
It's all about the devil and I 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 bloom.'

So let the sunshine in, face it with a grin
Smilers never lose and frowners never wins
So let the sunshine in, patient with a grin
Open up your heart and let the sunshine in.

When you are unhappy the devil wears a grin
But aw, he starts to running when the rain 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.

So let the sunshine in, face it with a grin
Smilers never lose and frowners never wins
So let the sunshine in, patient with a grin
Open up your heart and let the sunshine in.

If I forget to say my prayers the devil jumps with plea
But all he feels so 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 sunshine in.

So let the sunshine in, face it with a grin
Smilers never lose and frowners never wins
So let the sunshine in, patient with a grin
Open up your heart and let the sunshine in