draw aside the curtain

When young Rabbi Eleazar of Koznitz was a guest in the house of Rabbi Naftali of Ropshitz, he once cast a surprised glance at the window, where the curtains had been drawn.  When his host asked him the cause of his surprise, he said: "If you want people to look in, then why the curtains? And if you do not want them to, why the window?"

"And what explanation have you found for this?" asked Rabbi Naftali.

"When you want someone you love to look in," said the young rabbi, "you draw aside the curtain."