Authors:

When I devoted myself to poetry - and poetry is a very serious medium - I don't think the people that knew me as an individual with that tongue-in-cheek kind of humor...well, it didn't always lend itself to my poetry. When you're writing poetry, it's like working with gold, you can't waste anything. You have to be very economical with each word you're going to select. But when you're writing fiction, you can just go on and on; you can be more playful. My editor's main task is to cut back, not ask for more.

Source: www.english.illinois.edu
When I devoted myself to poetry - and poetry is a very serious medium - I don't think the people that knew me as an individual with that tongue-in-cheek kind of humor...well, it didn't always lend itself to my poetry.