imho this story aka experience was published in the watchtower decades ago...
The House-to-House Challenge
Challenge though it is, the house-to-house activity is not above the capabilities of even the most humble Christian. Thus, once a Mexican Witness from the rurals, dressed in very simple country garb, knocked at the door of a palatial mansion. A man in a silken bathrobe responded and asked what he wanted. The Witness said: “If a mule should come to your door with two bags of gold, would you accept it?” Annoyed, the householder replied: “I do not understand what you are telling me. I am a famous engineer.” The Witness then asked him: “What do you understand about prophecies?” The man admitted he did not know anything about them. Then the Witness said: “That is what I want to speak to you about. . . . I am that mule that came to your door, and the two bags of gold are these magazines, The Watchtower and Awake!” The man was impressed by the presentation of this humble Witness and took the two magazines. All of this calls to mind the incident recorded at Acts 4:8-13.