So our LORD is using something physical in order to draw her to ponder something Spiritual and in this we see His Sovereignty and how He is pleased to bring sinners to Himself.

This woman, she was blind to Christ's glory, here was God in the flesh speaking to her and she was really only occupied with material things and ignorant of Spiritual matters. That's a sign of blindness.

Yes, people today have the name of God, the name of Christ on their lips. They talk about eternity, they talk about judgment, salvation and yet it's all in natural terms. There's a blindness even as with Nicodemus in the previous chapter in John 3:3 when Christ spoke to him of the New Birth saying, "You must be born again." His response was, "How is it," in John 3:4, "that a man can be born when he's old? Can he enter the second time into his mother's womb and be born?" He was only thinking in terms of logistics physically and there are many that reveal their blindness because they read the Bible but they argue only about physical things.

Recently I had someone visit and I know they were joking but after a message in which I had, by God's Grace, endeavored to point the hearers to the LORD Jesus Christ alone, the question that was raised afterward was whether or not Adam had a belly button. People laughed and they think, "Well, you know, that would be interesting to discuss," or they like to ask, "Well, who was Cain's wife or Abel's?" These are physical, material things that people like to dwell on but that's not the point of Scripture.

The point of Scripture is: BEHOLD the LAMB!

It's just like with this woman, if people knew Who it was that said unto them, “give Me to drink” they would have asked of Him, and He would have given them Living Water.

It takes the LORD opening the heart and causing sinners to be regenerated or enlightened by the Holy Spirit. All natural men are ignorant of Spiritual things until the Spirit of God is pleased to open up their heart and mind.

Paul brings this out in his epistle to the Corinthians, 1 Corinthians 2, beginning with verse 9, "But as it is written, eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love Him."