You worship that which you don't know. We worship that which we know; for salvation is from the Jews.
The woman's conscience had been aroused by Christ's declaration of her sin. He was touching upon matters of the most vital importance, and her depraved heart naturally shrunk from the lancet, From the truth which was becoming inconveniently personal she flew to that natural resort of the carnal mind, namely, to religions discourse upon points of outward observance. Instead of confessing her sin, and asking how it may be forgiven, she must needs say, "Our fathers worshipped in this mountain; and ye say, that in Jerusalem is the place where men ought to worship." The carnal heart dreads the contact of spiritual truth, and finds a most convenient way of avoiding it by running to questions of holy places, holy times, and holy customs. Jesus, to her astonishment, informs her that the question which she had asked was of only temporary importance. There had been a time when it was well to know that salvation was of the Jews, and that the rival temple of the Samaritans was an imposture; but he says in effect to her, "Woman, believe me that question is of no importance now, for the hour cometh, yea and now is, when the external is to be abolished and the ritualistic is to be put away, and a purer, simpler, and more spiritual worship, is to take its place." The worship which our Lord Jesus Christ established involved a change. That is implied in the expressions here used. He announced to her that the hour was just then come when all questions about this or that place must cease, and be superseded by spiritual worship. Our Lord gave a very brief, but I think a very instructive description of what this worship was to be. If you observe carefully the words, you will see that it was a  distinguishing kind of worship, for he mentions  true worshippers. There had been but little distinction before; so long as they all passed through the same outward form they all seemed to be worshippers; but a distinction was now to be made clear and manifest. Merely outward worshippers were now false worshippers, and only those who pressed into spiritual worship were to be regarded as true. The gospel of Christ is a great discerner and an accurate judge. Christ has the winnowing fan in his hand; he sits as a refiner; he is compared by the prophet to the "refiner's fire" and to "fuller's soap;" and hence you see he discerns at once between worshippers and worshippers. There they stand both alike with bended heads, perhaps both repeating the same words, but the Savior distinguishes: "there is," saith he, "a false worshipper, and there is a true worshipper, and he alone who is spiritual is true." He announces further that under the gospel  God is to be worshipped in the character of a Father; true worshippers shall worship the Father. This had not been the case before. The Lord had been adored as the Adonai, and reverenced as Jehovah; but to say "Our Father which art in heaven" remains the prerogative of the enlightened Christian who, having believed in Christ, has received power to become a son of God. True Christian worship addresses God, not merely as Creator and Preserver, or as the great Lord of the Universe, but as one who is very near of kin to us, our Father, beloved of our souls. Jesus likewise states that gospel worship is to be of a kind which does not result from the man himself merely, but comes from God, and is  a work of grace. This is implied in the sentence, "The Father seeketh such to worship him," as if no true worship would come from any man unless God sought it. True devotion under the Christian dispensation is not merely human but also divine. It is the work of the Spirit in the soul returning to its author; or as our hymn puts it 