If then you are wise, you will show yourself rather as a reservoir than as a canal. For a canal spreads abroad water as it receives it, but a reservoir waits until it is filled before overflowing, and thus communicates, without loss to itself, its superabundant water. In the Church at the present day, we have many canals, few reservoirs.

Cantica Canticorum: Eighty-six Sermons on the Song of Solomon (ed. 1895)