The Doctor or His Mother?

Some time ago when talking to a native about salvation, we discovered that he was a Roman Catholic. He said that the blessed Virgin Mary was his saviour, and he was trusting to her for salvation.
We asked him, “If you are very sick and need help, do you send for the doctor, or for the doctor’s mother?”
“Why, for the doctor, of course,” replied the man in surprise.
“Now,” we said, “your soul is sick, and you need help to cure the disease of sin. Why do you go to the Doctor’s mother? The Lord Jesus is the Doctor to cure your sick soul. Go to Him. Don’t go to His mother!”
The man looked in amazement for a while, and then he said: “Well I never thought of that before!” After a long talk he seemed to be convinced; but turning away, he said so sadly: “I know what you say is right, but I must do what the priest says.”