And there is another kind, rarer, that is not a wall at all but a room — a space that opens up between two people once something true has finally been said and acknowledged, and there is nothing left to defend, and both of you are simply sitting in the aftermath of the truth, letting it settle.

That was the silence between Patricia and me across those three rows.

It was not the silence of enemies.

It was not, yet, the silence of friends.

It was the particular quiet of two strangers who had watched a child behave better than either of them, and had each been changed a little by the watching, and did not need to fill the air with words about it.

I sat with my son sleeping against my mother’s blue carrier, and three rows up my daughter read her book in the seat that was rightfully hers, and three rows back a woman held a wallet she had nearly lost to her chest, and none of us said anything, and it was, after everything, a good silence.