The fields are white already — As if he had said, The spiritual harvest is ripe already. The Samaritans, ripe for the Gospel, covered the ground round about them.
Related Commentaries of John 4:35
John 4:35
35 Say not ye, There are yet four months, and then cometh harvest? behold, I say unto you, Lift up your eyes, and look on the fields; for they are white already to harvest.