Whose Father is He?

A beggar came asking for food. I told him to come from back door, asked him to sit on floor. I brought food & said, "we shall pray. Repeat after me, Our Father in heaven". "Your Father in heaven" he said."No,our Father..." said me. "Your Father...." said he. Irritated, I asked why u say 'your' father when I say 'Our Father?' He said "sir, it's like this. If I say Our Father, then we both become brothers. If we r brothers, u would invite me from the front door and not from back :u would ask me to sit at ur dining table & would chat like brothers. Sir, somehow it's not possible. So he may be ur Father, but he can't be OUR FATHER.
Whose Father is He?
My?.. Your..? Her...? His...? Their...?
  Or Our Father...?
It took a beggar to teach me The truth!!!
....