I don't think it has much to do with education, sure that might've given him a slightly bigger vocabulary and made him better at grammar and formal writing and stuff but as far as being able to express yourself with words artistically I don't think that's something that really needs to be learned. You can naturally pick up a pretty wide variety of words and phrases just from people you meet, school, tv, radio and books etc if that's the way you're inclined, you don't necessarily have to especially study for it. And then being able to put them together so well is just a talent he was born with I suppose.