And even outside the canon, which to our great advantage is fixed in a place of secure authority, there is no want of ecclesiastical writings, in reading which a man of ability will acquire a tinge of the eloquence with which they are written, even though he does not aim at this, but is solely intent on the matters treated of; especially, of course, if in addition he practise himself in writing, or dictating, and at last also in speaking, the opinions he has formed on grounds of piety them, and who speak with fluency and elegance, cannot always think of them when they are speaking so as to speak in accordance with them, unless they are discussing the rules themselves