Read it! John 4 

“Come, see a man who told me everything I ever did. Could he be the Messiah?”

(vs29)

Think it through

John tells us that the woman at the well was there at noon. No one else was getting water when the day was at its hottest. John might as well have said, “This woman was a social outcast, shunned by her town.” And we find out in verse 18 that Jesus knew exactly why. He knew everything she ever did.