Difference between poetry and prose?

[Leanne]

I don't know, I've never kept a journal or a diary But I know a lot of people use them to document thoughts or ideas, not just events.

To be honest, I'm good with just one poetic device used well, but I tend to think that to qualify as poetry it should have more than one layer of meaning e.g. use of metaphor, allegory, intertext or allusion.

Then again, not everyone will pick up on more than one layer even if it's there.