This is cool. I've never thought about it, but it must be really easy to write poetry in Italian, since pretty much every verb in the same tense rhymes!

Is this a proverb?

I think more of a quote; google gives most links from a song by Max Gazzè, "L'amore pensato", but I'm not sure it's his.

Agreed. I have always thought that written Italian is comparatively very flowery and so, especially suited for such poetic statements