A few months ago, I listened to a Glenn Miller compilation album and transcribed some of the lyrics. I noticed something interesting about the lyrics of "Wishing (Will Make It So)," which are pretty short and worth quoting in their entirety:
Wishing will make it so
Just keep on wishing, and cares will go
Dreamers tell us dreams come true
It’s no mistake
And wishes are the dreams we dream
When we’re awake
The curtain of night will part
If you are certain within your heart
So if you wish long enough
Wish strong enough
You will come to know
Wishing will make it so
The second verse has two instances of internal rhyme ("curtain" with "certain" and "long" with "strong") where the first doesn't have any. In a way, the increasing prevalence the rhymes mirrors the first line (and the title): "wishing will make it so;" with prolonged effort and time, things will fall into place and become better.