Chorus:
Said you must be good
So that you can sleep at night
And you must be good
So that your mamma can hold you tight
And you can't be bad, can't be bad
Or the devil come lick you
Whoah you must be good, you must be good
No, don't let him trick you

Oh every day, tempted by temptation
And every night by another situation
But you must be wise, be wise and recognise
Or the devil come pull you down in a girlish disguise

Chorus

Avarice and envy, lord these sins are deadly
Greed and vanity now, they hurt a good man plenty
But you must take care now, and beware in your youthful 
insobriety
Your cup may be full now, but in the end it will be 
empty.

Chorus

I said you must be good, you must be good
Don't let him trick you
I said you must be good, you must be good
You must be good...

Etc.