A Blind man was leaving a friend's house at night when he was suggested to carry a lantern. Laughing aloud, the blind man snapped, "What do I need light for? It makes no difference to me. I know my way home !"

His friend patiently replied, "Yes, I knew. But it's for others to see, so that they won't bump into you."

Sneering, the blind man agreed to use it. A little down the road, someone accidentally bumped into the blind man, startling him.

Fuming, he yelled, "Hey! You're not blind! So make way for the blind man!"

Further down the road, another person bumped into him. This time, he got angrier, shouting, "Are you blind? Can't you see the lantern? I'm carrying it for you!”

The stranger replied, "You are the blind one! Can't you see your lantern has gone out?" The blind man was stunned.

Moral and inspiration of this story: those who use the others' words to teach people can be likened to the blind one. The light of the lantern was long gone out but he himself did not realize it