For as thirsty men, when they have taken a bowl, eagerly drain it and then desist, so too they who hear the divine oracles if they receive them thirsting, will never be weary until they have drunk them up. For to show that men ought ever to thirst and hunger, "Blessed," It said, "are they which do hunger and thirst after righteousness" (Matt.5:6)
-St. John Chrysostom, Homily 51 on John 7, 4th Century


For the grace of the Spirit, when it has entered into the mind and has been established, springs up more than any fountain, fails not, becomes not empty, stays not. To signify therefore at once its unfailing supply and unlimited operation, He has called it "a well" and "rivers," not one river but numberless.
-St. John Chrysostom, Homily 51 on John 7, 4th Century