John 4:13 - Matthew Poole's English Annotations on the Holy Bible

Our Saviour in his reply justifieth the excellency of that living water, which he had before declared to be in his power to give, and his readiness to have given to this woman, if she had asked it of him, from the perishing virtue of the water of this well, and the continuing virtue of his grace, which he compared to this living water: no man so assuaged his thirst by drinking of the water of Jacob's well, but he was subject to thirst again.