Elevant

There is a parable attributed to the Buddha: A group of blind men are led to an elephant, each to a different part of the animal's body, and asked to describe what they feel. One feels the head; the next the ears; another, a tusk; the next, a foot; another, the tail, and so on. Each is told that the part to which he has access is the elephant, and so each man insists that he knows what an elephant is, when he can't see the entire animal.