The woman said to him, "I know that Messiah comes," (he who is called Christ). "When he has come, he will declare to us all things."

 The well itself was more than 100 feet deep. It is not a springing well of water; it is a wet into which the water percolates and gathers. But clearly it was a well so deep that no one could gain water from it unless he had something with which to draw the water. 