What shows that the angels sent to Abraham and Lot were real beings?

Answer

"And he [Abraham] took butter, and milk, and the calf which he had dressed, and set it before them; and he
stood by them under the tree, and they did eat." "And he [Lot] made them a feast, and did bake unleavened
bread, and they did eat." Gen. 18:8; 19:3.

Who is the Comforter, and what was He to do?
In what literal language is this persecution of the people of God further described?
What day is especially indicated as the day to prepare for the Sabbath?
What trying experience did Christ then foretell?
When did the moon refuse to give her light?
How does Satan deceive the people?
To whom is the gospel the power of God unto salvation?

Questions & Answers are from the book Bible Readings for the Home Circle