There was a huge snowstorm in Jerusalem and the principal of a particular cheder (religious school) called one of his rabbinic teachers and said to him, "Rabbi, you don’t have to come in today. Only 6 children have shown up due to the snow."
The rabbi replied, "That’s OK, I'm coming in anyway.”
“I admire your dedication rabbi,” said the principal, “but it’s not necessary.”
“It’s definitely necessary,” replied the rabbi. “In my house there are 15 children!"