Glossa Ordinaria
Catena Aurea · Matthäusevangelium 13
All these things spake Jesus unto the multitude in parables; and without a parable spake he not unto them. That it might be fulfilled which was spoken by the prophet, saying, I will open my mouth in parables; I will utter things which have been kept secret from the foundation of the world.
(ap. Anselm.) As though He had said, I who spoke before by the Prophets, now in My own person will open My mouth in parables, and will bring forth out of My secret store mysteries which have been hidden ever since the foundation of the world.