Nemo intrat in caelum nisi per philosophiam. - Johannes Scotus Eriugena

For authority proceeds from true reason, but reason certainly does not proceed from authority. For every authority which is not upheld by true reason is seen to be weak, whereas true reason is kept firm and immutable by her own powers and does not require to be confirmed by the assent of any authority.

One man stands head and shoulders above his contemporary scholars: head and shoulders, some hold, above the Middle Ages: John Scotus Erigena.

When we are told that God is the maker of all things, we are simply to understand that God is in all things – that He is the substantial essence of all things.