Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. It has been then ever with great reverence and awe that the holy fathers ever spoke of this very solemn subject. Si Augustine, although he had often knocked and sought and asked, long avoided to speak of it, until at last a special call seemed to invite him 5 S. Athanasius when enquired of, shrunk once and again from answering, fearing lest, although immersing his mind into it, and beginning to search deeply, he should not be able to draw forth the deep meaning which lay therein. At last he essayed, having first much prayed the Lord Who sat upon the well and walked upon the water. And thus although, of ourselves, it were rather fitting that we should be silent altogether, the mercy of the Lord enables us to tell you, how they whom He had so instructed, understood His words.