Someday I'll wish upon a star.
Once I built a railroad; now it's done. Brother, can you spare a dime?
Virtue is its own revenge.
There ought to be a law against necessity.
Say, it's only a paper moon, / Sailing over a cardboard sea.
When the melody touches your heart emotionally and the words hit your brain intellectually, more than likely you'll find you'll have an excellent song to sing.