Some of our earliest writing, in cuneiform, was about who owes what.
Like the trains, she's never on time and always departing.
Make the verses flow together. If a following verse has nothing to do with the previous, you may lose our listener/reader. You want a smooth flow to hear or read, and it's easier to memorize.
The proper study of Mankind is Everything.
If I love you, is that a fact or a weapon?
More powerful than God, more evil than the Devil; the poor have it, the rich lack it, and if you eat it you die?