The woman said unto him, I know that Messiah comes, who is called Christ: when he comes, he will tell us all things.
All Commentaries on John 4:25 Go To John 4
John Chrysostom
AD 407
The woman was struck with astonishment at the loftiness of His teaching, as her words show: The woman said to Him, I know that Messias comes, which is called Christ.
But what reason had the Samaritans for expecting Christ's coming? They acknowledged the books of Moses, which foretold it. Jacob prophesies of Christ, The scepter shall not depart from Judah, nor a lawgiver from beneath his feet, until Shiloh come. And Moses says, The Lord your God shall raise up a Prophet from the midst of you, of your brethren.
Christ now reveals Himself to the woman: Jesus said to her, I that speak to you am He. Had He told the woman this to begin with, it would have appeared vanity. Now, having gradually awakened her to the thought of Christ, His disclosure of Himself is perfectly opportune. He is not equally open to the Jews, who ask Him, If You be the Christ, tell us plainly; for this reason, that they did not ask in order to learn, but to do Him injury; whereas she spoke in the simplicity of her heart.