(5) Tree Line
Sure it's Ferlinghetti, so we don't have to worry so much about those five-dollar words and tricky philosophies. But since he's writing about Beauty, Truth, and Poetry, we know the poem's not going to be a leisurely walk in the park. We're inevitably going to see some abstract ideas, figurative language, and of course enjambment. But it's groovy, man, so dig it.