Wow. I didn't know Roshanak. It could be proudly bcz we have invented Paradise word not Hell and it shows me we were looking for everything peacefully in contrast of nowadays.
It's not tree Ruben.the mean was heaven.
In 3000 B.c people in Iran built around the houses gardens and called them "pe ere deese" .and then this word in anceint persian language turn to "paradise" . And then in farsi was "pardis" that means was heaven. (People in Iran image garden like heaven).