Cyril of Jerusalem, on Acts 1:5

“For John indeed baptized with water, but you shall be baptized with the Holy Ghost, not many days hence.”

“This grace was not in part, but his power was in full perfection; for as he who plunges into the waters and is baptized is encompassed on all sides by the waters, so were they also baptized completely by the Holy Spirit. The water, however, flows round the outside only, but the Spirit baptizes also the soul within, and that completely. And why do you wonder at this? Take an example from matter, a simple and common example, but one that helps the ordinary person. If the fire passing in through the mass of the iron makes the whole of it fire, so that what was cold becomes burning and what was black is made bright, if fire which is a body thus penetrates and works without hindrance in iron which is also a body, why wonder that the Holy Spirit enters into the very inmost recesses of the soul?”

Imported from an open dataset — not yet checked against the printed edition.