Many sayings in the Persian language have their origins in the works of our great classical poets. Still, I find it amazing that a single poem of Nezami Ganjavi contains so many of our beloved Persian sayings. Here are selected verses. I have taken the liberty of making a couple of corrections to the version available on ganjoor.net. http://ganjoor.net/nezami/5ganj/leyli-majnoon/sh9/