ACTS BIBLE
Abraham week 9 · Genesis 18:1-15
Three men at the tent door, a meal under the tree, and a question that hangs over the whole book: is any thing too hard for the LORD?
And the LORD appeared unto him in the plains of Mamre: and he sat in the tent door in the heat of the day; and he lift up his eyes and looked, and, lo, three men stood by him (Genesis 18:1-2). The narrator tells the reader in the first verse what Abraham discovers across the chapter: this visit is the LORD. Two of the three walk on toward Sodom in verse 22 and arrive there as two angels in 19:1; the third stays, and Abraham ends the chapter standing yet before the LORD. God has come to dinner.
Abraham runs, at ninety-nine, in the heat, bows himself toward the ground, and talks his guests into staying with the courtesy of the old East: a little water, a morsel of bread. Then he sprints the kitchen into motion, three measures of fine meal, a calf tender and good, butter and milk, and he stands by them under the tree while they eat (18:6-8). The New Testament remembers this scene when it commands an open door: Be not forgetful to entertain strangers: for thereby some have entertained angels unawares (Hebrews 13:2). Abraham did not know at verse 2. He served first and learned later who was at his table.
The guest asks a question no stranger should be able to ask, Where is Sarah thy wife?, and then speaks the promise with a date on it: I will certainly return unto thee according to the time of life; and, lo, Sarah thy wife shall have a son (18:9-10). Sarah, listening at the tent door, laughs within herself, and the text gives her arithmetic full weight: it had ceased to be with her after the manner of women; her lord is old too. The laugh is not mockery, it is realism. And the LORD answers realism with the question the whole Bible keeps asking: Is any thing too hard for the LORD? (18:14). The same words come back at the announcement of another impossible birth, when Gabriel tells a virgin, with God nothing shall be impossible (Luke 1:37). Sarah, afraid, denies laughing, and receives the gentlest rebuke in Genesis: Nay; but thou didst laugh (18:15). God does not scold the laugh. He simply refuses the denial, and then he keeps the promise anyway, and names the baby after it: Isaac, he laughs.
Hebrews reads Sarah into the honor roll on the strength of where this lands: Through faith also Sara herself received strength to conceive seed... because she judged him faithful who had promised (Hebrews 11:11). The laugh at the tent door became that judgment; realism about her body gave way to realism about her God. The chapter teaches where faith actually lives, not in pretending the obstacle is small, but in measuring the obstacle honestly and the Promiser more honestly still. The course's next week follows the two who walked on toward Sodom, and the One who stayed to let Abraham argue.