Catena Aurea on John 19:31–37: John Chrysostom

As if to say, I did not hear it from others, but saw it with mine own eyes. And his record is true, he adds, not as if he had mentioned something so wonderful that his account would be suspected, but to stop the mouths of heretics, and in contemplation of the deep value of those mysteries which he announces.

And he knoweth that he saith true, that ye might believe.