What comment does Benjamin the donkey make that shows his cynicism and bad temper in "Animal Farm"?

At the beginning of the novel we are introduced to all the animals.  The reader is told that, "Benjamin is the oldest animal on the farm, and the worst tempered.  He seldom talked and when he did it was usually to make some cynical remark - for instance, he would say the God had given him a tail to keep the files off, but that he would sooner have had no tail and no flies."

We also read that Benjamin never laughs.  He is the only animal on the farm that never laughs.  When the animals asked him why he never laughed Benjamin replies, "I didn't see anything funny."

There is more information on Animal Farm at the link listed below.