The Sack of Wisdom (Traditional story from Togo) “Spider, why don’t you put the sack on your back? Then it will be much easier to climb the tree.” here was a time when there was no more intelligent animal in the world than Yavi the spider. She was wise, prudent and very clever, but that wasn’t enough for her. Yavi was worried because the other animals were becoming increasingly more intelligent. She was especially jealous of humans because she knew that very soon they would be as wise as she was.