Board Thread:Naruto Discussions/@comment-27883716-20160228133805/@comment-26369387-20160228205737

^Except it wouldn't be really "eternal", when you really think about. The dream would last 'till you turn into Zetsu, losing the dream and yourself. Nothing would be left but Zetsu.

Also, people have need to reach something new and the eternal peace, where everything would always be the same, would eventually feel boring.