What is the difference between poems and rhymes?

I think that rhymes show less thoughts and feelings about the person that writes one. But poems are deeper and more emotional.

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The difference between rhymes and poetry is that there is more going on in poems than just rhyming, and poetry doesn't always rhyme.

A rhyme would be simply: true knew blue few goo

To make a poem, you have to have some meaning there as well, and even in rhyming poetry, the rhymes only come at the ends of the line... so there is a lot more there than just the rhyme.

To outer space, my heart was true
Until the day my spirit knew

My beloved alien, with skin of blue
Had been shot to pieces by the few

Who consider aliens lumps of goo.

Even with this abyssmal example that I just made up, you can see that there is more there than merely the rhyme. There is a story, or an emotion, or an idea there that you wouldn't get with merely a rhyme.