The famous Sufi master Rumi, who is very well known to most of you, has a story in which he talks of a man who goes to the house of a friend, and he knocks on the door, and a voice answers, "Who's there?"
El famoso maestro sufí, Rumi, muy conocido por ustedes, cuenta una historia sobre un hombre que visita la casa de un amigo toca la puerta, y una voz responde: "¿Quién es?"