I like the story of the rich man who lived a miserable life.
He visited a rabbi to talk about his depression. The rabbi took the rich man by the hand and led him to a window. "Look out there," he said. The rich man looked into the street, "What do you see?" asked the rabbi.
"I see men, women, and children", answered the rich man.
Again the rabbi took him by the hand and this time led him to a mirror. “Now what do you see?"
"Now I see myself", the rich man replied.
Then the rabbi said, "Behold, in the window there is a glass, and in the mirror there is a glass. But the glass of the mirror is covered with a little silver, and no sooner is the silver added than you cease to see others, and you see only yourself."