In the movie "Bells Are Ringing"

You gotta do you gotta do it gotta do it all alone
No one else will do it for you you're on your own
Do it
It may be love or war or mopping up the floor but just do it
Don't send a friend who's true to pitch your woo for you or you'll rue it
Do it yourself
Don't fake it
If you're a fake you won't make it
Wait for your break and then take it
For time and tide they wait for no man go go go man
Do it
To prove a point at hand just look at old Miles Standish who blew it
He said John Alden will you go ask Priscilla to do it
Miles got the heave ho
Man
Priscilla said that Miles is gone speak for yourself John
He blew it so do it do it do it yourself