Parable: Glass. A Jewish parable

Rabbi, I don't understand: come to the poor man - he is friendly and helps as best he can. Come to the rich man - he sees no one. Is it only for the money?
- Look out the window. What do you see?
- A woman with a child, the wagon, riding on the market...
Okay. Now look in the mirror. What do you see?
Well, I can see down there? Only himself.
- So: window glass and mirror glass. One need only add a bit of silver - and already see myself.