Jesus says to her: Give me water to drink. For his disciples had gone to the city to buy food. The Samaritan woman therefore says to him: How is it that you, though a Jew, ask me for water to drink, though I am a Samaritan woman? For Jews have nothing to do with Samaritans.
The Samaritans were foreigners; Jews never used their utensils. The woman was carrying a pail for drawing water. She was astonished that a Jew should ask her for a drink of water, a thing that Jews would not do. But the one who was asking for a drink of water was thirsting for her faith.
Listen now and learn who it is that asks for a drink. Jesus answered her and said: If you knew the gift of God, and who it is that is saying to you, “Give me a drink”, perhaps you might have asked him and he would have given you living water.
He asks for a drink, and he promises a drink. He is in need, as one hoping to receive, yet he is rich, as one about to satisfy the thirst of others. He says: If you knew the gift of God. The gift of God is the Holy Spirit. But he is still using veiled language as he speaks to the woman and gradually enters into her heart. Or is he already teaching her? What could be more gentle and kind than the encouragement he gives? If you knew the gift of God, and who it is that is saying to you, “Give me a drink”, perhaps you might ask and he would give you living water.
What is this water that he will give if not the water spoken of in Scripture: With you is the fountain of life? How can those feel thirst who will drink deeply from the abundance in your house?
He was promising the Holy Spirit in satisfying abundance.