After 90 years, Sarah finally has a son. Abraham names him Isaac, the name G-d gave him before he was born, and circumcises him on the eighth day. It should be the happiest moment in the household. Instead, people are talking. Sarah spent a night in King Abimelech’s palace, and less than a year later a woman who could never conceive is holding a baby. The cynics of the generation have a theory about who the father really is.

Rabbi Epstein says the gossips stumbled onto something true. Sarah answers the doubters on the day Isaac is weaned, when she nurses the children of the women who questioned her. Then the family begins to split. Sarah sees Ishmael, now 16, “mocking,” a word the Sages read as something far darker, and she insists that he and Hagar leave. Abraham is deeply distressed. G-d tells him to heed her voice. Rabbi Epstein explains what that phrase reveals about Sarah, and why G-d chose to send this message through her and not through Abraham.

Abraham and Sarah arrive in Gerar, and Abraham tells everyone Sarah is his sister. She is, technically: his half-sister. She is also his wife (and one of the 4 most beautiful women ever to live). So when King Abimelech hears there's an unmarried woman in town, he has her brought to his palace. That night G-d appears to Abimelech in a dream with a warning: give her back or you die. By morning the orifices of his entire household are sealed shut, and he summons Abraham with one question, “What did you see, that you did this thing?”

Abraham's answer is that there is no fear of G-d in this place. Rabbi Epstein calls it the crux of the whole passage, and he reads it as a direct challenge to a man who thinks of himself as righteous. If you decide for yourself what righteous means, you will never be righteous.

Then comes a puzzle. This is the second time Sarah has been taken. Twenty-four years earlier, Pharaoh took her too, and G-d struck his household with a painful skin disease. Abimelech gets something else entirely. Same woman, same offense, different punishment. Why would G-d change it? Rabbi Epstein's answer comes from a teaching in the Talmud, and it changes how you read what happens to Abraham and Sarah next.

Abraham tells the people of Gerar that Sarah is his sister, the second time he's made this claim about her. King Abimelech then takes her into his house, and that night G-d comes to him in a dream with a warning: return her, or die. Abimelech wakes up to find his bodily orifices sealed shut, and he asks Abraham “what have you done to us?”

Rabbi Epstein and Tom dig into whether Abraham actually lied when he claimed Sarah was his sister. That question opens into a teaching from Rabbi Eliyahu Dessler on emet and sheker, the two Hebrew words usually translated as truth and falsehood, and the cases where the honest thing to say isn't the same as the accurate thing to say.