Origen
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.
(tom. xiii. c. 20) But if the Father seeks, He seeks through Jesus, Who came to seek and to save that which was lost, and to teach men what true worship was. God is a Spirit; i. e. He constitutes our real life, just as our breath (spirit) constitutes our bodily life.