Glossa Ordinaria

And in this we know. To know or to recognize is not always said on account of acquaintance, but on account of experience and union with another thing. We know God when we are united to him. He who so knows, keeps his commandments. If we observe his commandments. We ought to attend to our frailty, we ought in our sins to seek an advocate; and that we may obtain him, let us labour at keeping the commandments, through which one comes to the knowledge of him.