Theophylact of Ohrid
Catena Aurea · Johannesevangelium 4
The woman saith unto him, Sir, I perceive that thou art a prophet. Our fathers worshipped in this mountain; and ye say, that in Jerusalem is the place where men ought to worship. Jesus saith unto her, Woman, believe me, the hour cometh, when ye shall neither in this mountain, nor yet at Jerusalem, worship the Father. Ye worship ye know not what: we know what we worship: for salvation is of the Jews. But the hour cometh, and now is, when the true worshippers shall worship the Father in spirit and in truth: for the Father seeketh such to worship him. God is a Spirit: and they that worship him must worship him in spirit and in truth.
Or, because many think that they worship God in the spirit, i. e. with the mind, who yet held heretical doctrines concerning Him, for this reason He adds, and in truth. May not the words too refer to the two kinds of philosophy among us, i. e. active and contemplative; the spirit standing for action, according to the Apostle, As many as are led by the Spirit of God; (Rom. 8:14) truth, on the other hand, for contemplation. Or, (to take another view,) as the Samaritans thought that God was confined to a certain place, and ought to be worshipped in that place; in opposition to this notion, our Lord may mean to teach them here, that the true worshippers worship not locally, but spiritually. Or again, all being a type and shadow in the Jewish system, the meaning may be that the true worshippers will worship not in type, but in truth. God being a Spirit, seeketh for spiritual worshippers; being the truth, for true ones.