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.

Is mere assent to divine truth sufficient?
What did he tell them to do?
What is the beginning of wisdom?
Was the Sabbath intended as a day for public worship?
Did Christ, while on earth, keep the Sabbath?
How did David express himself on this point?
12. What class of God's servants have evil angels, through wicked men, seemed to make special objects of attack?

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