If a line scans well, then the emphasized beats match the emphasized syllables. Compare this:
MARy HAD a LITtle LAMBto this:
MARy HAD a SMALL parAkeetWhen it comes down to it, the scan is far more important than the rhyme. Don't believe me? Listen to Chicago's Questions 67 & 68. There's not one rhyme in that song. Because all the words fall neatly into place, you don't even notice until someone points it out.
Good scansion also goes a long way toward selling the lyrics.
Not long ago, fellow songstress Jannie Funster posted a snippet of something she's working on in my comments:
Give it awayBecause I'd never heard the song, I first read these lyrics as if they were prose, with no idea how they'd scan. My impression: Hmm, that's nice. Yep. Nice message.
it'll come back to ya.
Sweeter and deeper than
you ever dreamed.
Give it away
it'll come back to ya.
Give it away.
But then, out of songwriterly curiosity, I looked at the lines again to figure out where the emphases should go.
GIVE it aWAY (beat beat)Suddenly the snippet was amazingly hooky. It stuck in my head without so much as a melody to help keep it there. And the lyrics! So insightful and meaningful and TRUE.
IT'll come BACK to ya
SWEETer and DEEPer than
YOU ever DREAMED
Line the words up with the beat, and their impact increases a hundredfold.