Reading Tennyson is like stepping aboard the world's strangest roller coaster. The title of the ride looks to be safe enough, but when the cart-man straps on the safety belt you're jolted in a way that you did not even know was a direction. It's not down or up, left or right. It is an adventure to in-side yourself as seen through the life of another. You're caught off card, and then you're calmed down. You think it's over, and then there's the loop'd loop. You don't know if you're ready to throw up or eat the sweet dessert like lines in the next stanza. By the time this moral rollercoaster…