Paul commands: ‘Therefore, brethren, stand fast and hold the Traditions which you have been taught, whether by word or by our letter.’ From this it is clear that they did not hand down everything by letter, but there is much also that was not written. Like that which was written, the unwritten too is worthy of belief. So let us regard the Tradition of the Church also as worthy of belief. Is it a Tradition? Seek no further.