The lectionary has put a woman shouting a compliment about a womb next to a paragraph arguing that ancestry is not what makes an heir. That is not an accident, and it is a bolder pairing than it looks.

Start with the paidagōgos, because everything in Galatians 3 depends on getting him right. He is not a teacher. He is the household slave who walks the boy to the schoolroom and makes sure he behaves on the way — remembered in ancient literature for his strictness, his strap, and his complete lack of standing in his own right. And the single most important fact about him, which every reader in Galatia knew from childhood, is that the arrangement expires. There is no examination and no graduation. A boy reaches a certain age and the chaperone is no longer assigned to him.

So when Paul says we are no longer under a paidagōgos, he is not saying the law failed, or was cruel, or has been proved wrong. He is saying the boy has grown up. The custody was real — ephrouroumetha, we were held under guard — and the guarding was not malicious; a chaperone is posted around a child because a child cannot yet be trusted on the road. What has changed is not the quality of the law but the age of the household.

Then comes the baptismal formula, which reads like something the Galatians could already recite, and the three pairs. The first two are the standard social divisions, cancelled with neither/nor. The third pair he writes differently — not male and female — because he is no longer listing a social division but quoting Genesis 1:27. He has gone past the categories society uses and put his hand on the sentence that established them.

The psalm then does something the lectionary rarely gets to do so cleanly: it speaks the disputed phrase out loud. Zera Abraham — you seed of Abraham — sung by a congregation on the morning Galatians 3:29 tells Gentile converts that this is now their name. And the psalm's own instruction is zikhru, remember, and baqshu fanav tamid, seek his face continually — which is not a genealogy but a practice.

And then the woman in the crowd, who says the warmest and most ordinary thing available: blessed is the body that made you. There is nothing wrong with it. It is how people talked, and it is true. The answer moves the blessing off the body and onto an activity — hearing the word of Theos and guarding it — and the reason this is not cold is that Luke has already shown us his mother doing exactly that, twice, and had Elizabeth pronounce a beatitude on her believing rather than her bearing.

Put the two together and the day's claim is single and firm. Neither Abraham's descendants nor Jesus's own family hold their standing by blood. The seed of Abraham turns out to be anyone who belongs to Christ; the blessed mother turns out to be blessed for what she kept in her heart. In both cases the thing that looked like an accident of birth is reassigned to something a person actually does — and in both cases the reassignment is generous rather than restrictive, because it opens a door that ancestry had kept shut.

Phylassontes, guarding. On the day the old garrison is stood down, a new watch is posted, and this time we are the ones on duty.