A man was spending his holiday in Africa. One day he watched the elephants passing by. To his great surprise these giant strong animals were being held only by a small rope, tied to their front leg. Obviously, they could easily run away any moment. However, they did not.
Then he saw a trainer and asked him, how could this happen that not a single elephant makes an attemp to break free. The trainer explained: „When the elephants are very young, we use the same size rope to tiethem, and at that time it is enough to hold them. Gradually they grow up, get stronger, nevertheless they never try to get away, as they believe that the rope will still hold them.