Jesus answered her, "If you knew the gift of God, and who it is who says to you, 'Give me a drink,' you would have asked him, and he would have given you living water."
Living water. Though the nameWater is borrowed from the present occurrence, and applied to the Spirit, yet this metaphor is very frequent in Scripture, and rests on the best grounds. For we are like a dry and barren soil; there is no sap and no rigour in us, until the Lord water us by his Spirit. In another passage, the Spirit is likewise called clean water, (Hebrews 10:22,) but in a different sense; namely, because he washes and cleanses us from the pollutions with which we are entirely covered. But in this and similar passages, the subject treated of is the secret energy by which he restores life in us, and maintains and brings it to perfection. There are some who explain this as referring to the doctrine of the Gospel, to which I own that this appellation is fully applicable; but I think that Christ includes here the whole grace of our renewal; for we know that he was sent for the purpose of bringing to us a new life. In my opinion, therefore, he intended to contrast water with that destitution of all blessings under which mankind groan and labor. Again, living water is not so called from its effect, as life-giving, but the allusion is to different kinds of waters. It is called living, because it flows from a living fountain. 