Genesis 18: 9 – 13: And they said unto him, Where is Sarah thy wife? And he said, Behold, in the tent. And he said, I will certainly return unto thee according to the time of life; and, lo, Sarah thy wife shall have a son. And Sarah heard it in the tent door, which was behind him. Now Abraham and Sarah were old and well stricken in age; and it ceased to be with Sarah after the manner of women. Therefore Sarah laughed within herself, saying, After I am waxed old shall I have pleasure, my lord being old also? And the LORD said unto Abraham, Wherefore did Sarah laugh, saying, Shall I of a surety bear a child, which am old?
When God appeared in human flesh to Abraham, He demonstrated the Messianic sign by discerning the thoughts of Sarah’s heart who was in the tent behind Him. In the message “Who is this Melchisedec?” preached on February 21, 1965, the prophet turned His back to the audience and continued to demonstrate the gift of discernment, calling out the names and conditions of various ones who were seated behind him. This was God expressing Himself in human flesh again, the Son of Man (Revelation 10: 1) revealing Himself through a Son of Man (Revelation 10: 7), showing the Messianic sign in these last days.