In a big house, there once lived a lonely canary in a cage. The canary would sing every morning and delight the owners with his beautiful voice but when evening came, the canary felt lonely. One morning he woke up and found another canary with him in the cage. They became friends right away and were always together. They ate together, drank together and even sang together. The canary was so happy because he was no longer lonely.
The canary thought there was another bird in the cage, but actually, the owners had hung a mirror in his cage. The friend he saw eating, drinking and singing with him was just his own reflection in the mirror.