John 4:10

10. If thou knewest Lange unworthily makes our Lord say this as a sort of contest or issue with her. On the contrary, here commences a train of suggestion and query by which the Lord directly leads her mind to the perception that he is not merely a soothsayer or clairvoyant, but a holy prophet of the true Jehovah. John 4:19. He does this, first, by (10-15) raising her thoughts from the material to the supernatural; and, second, by leading her, through a route which discloses to herself her sin, to himself as the prophetic searcher of guilt, 16-19.

The gift of God The divine gift of the draught of eternal life through the Messiah.

Living water By a suggestive double sense, living water may mean pure running water, or it may mean the water of divine life, thus forming a transition from the physical to the spiritual.